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20021321302121 = 236192633534101
BaseRepresentation
bin1001000110101100100111…
…01111101000000001101001
32121220000112022020212200002
410203112103233220001221
510111012131223131441
6110325400143352345
74134331002060356
oct443262357500151
977800468225602
1020021321302121
116419aa3a13987
1222b4323bb26b5
13b23005644639
144d3073c0b62d
1524ac01aedb9b
hex123593be8069

20021321302121 has 16 divisors (see below), whose sum is σ = 20933551059840. Its totient is φ = 19112593315200.

The previous prime is 20021321302049. The next prime is 20021321302163. The reversal of 20021321302121 is 12120312312002.

It is a cyclic number.

It is not a de Polignac number, because 20021321302121 - 222 = 20021317107817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021321302093 and 20021321302102.

It is not an unprimeable number, because it can be changed into a prime (20021321302921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37218971 + ... + 37753071.

It is an arithmetic number, because the mean of its divisors is an integer number (1308346941240).

Almost surely, 220021321302121 is an apocalyptic number.

It is an amenable number.

20021321302121 is a deficient number, since it is larger than the sum of its proper divisors (912229757719).

20021321302121 is a wasteful number, since it uses less digits than its factorization.

20021321302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537376.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20021321302121 its reverse (12120312312002), we get a palindrome (32141633614123).

The spelling of 20021321302121 in words is "twenty trillion, twenty-one billion, three hundred twenty-one million, three hundred two thousand, one hundred twenty-one".

Divisors: 1 23 619 2633 14237 60559 534101 1629827 12284323 37486021 330608519 1406287933 7603995937 32344622459 870492230527 20021321302121