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20102102012021 = 291811382758659
BaseRepresentation
bin1001001001000011000101…
…01001100101000001110101
32122011202001001102010022112
410210201202221211001311
510113323101103341041
6110430440030340405
74143220553554211
oct444414251450165
978152031363275
1020102102012021
116450287585957
122307b0935a705
13b2a80a437073
144d6d3852d941
1524cd7d8d3deb
hex124862a65075

20102102012021 has 8 divisors (see below), whose sum is σ = 20806760757600. Its totient is φ = 19398208787440.

The previous prime is 20102102012009. The next prime is 20102102012039. The reversal of 20102102012021 is 12021020120102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20102102012021 - 222 = 20102097817717 is a prime.

It is a Duffinian number.

20102102012021 is a modest number, since divided by 2012021 gives 201021 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20102102011987 and 20102102012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102102012071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191326811 + ... + 191431848.

It is an arithmetic number, because the mean of its divisors is an integer number (2600845094700).

Almost surely, 220102102012021 is an apocalyptic number.

It is an amenable number.

20102102012021 is a deficient number, since it is larger than the sum of its proper divisors (704658745579).

20102102012021 is a wasteful number, since it uses less digits than its factorization.

20102102012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382760499.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102102012021 its reverse (12021020120102), we get a palindrome (32123122132123).

The spelling of 20102102012021 in words is "twenty trillion, one hundred two billion, one hundred two million, twelve thousand, twenty-one".

Divisors: 1 29 1811 52519 382758659 11100001111 693175931449 20102102012021