20102111201221 has 8 divisors (see below), whose sum is σ = 23462646508800. Its totient is φ = 16863777177648.

The previous prime is 20102111201203. The next prime is 20102111201231. The reversal of 20102111201221 is 12210211120102.

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 20102111201221 - 2¹³ = 20102111193029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102111201195 and 20102111201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102111201231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30550320646 + ... + 30550321303.

It is an arithmetic number, because the mean of its divisors is an integer number (2932830813600).

Almost surely, 2^{20102111201221} is an apocalyptic number.

It is an amenable number.

20102111201221 is a deficient number, since it is larger than the sum of its proper divisors (3360535307579).

20102111201221 is an equidigital number, since it uses as much as digits as its factorization.

20102111201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61100642003.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20102111201221 its reverse (12210211120102), we get a palindrome (32312322321323).

The spelling of 20102111201221 in words is "twenty trillion, one hundred two billion, one hundred eleven million, two hundred one thousand, two hundred twenty-one".