20102102022121 has 48 divisors (see below), whose sum is σ = 23805911923200. Its totient is φ = 16620548765184.

The previous prime is 20102102022103. The next prime is 20102102022133. The reversal of 20102102022121 is 12122020120102.

It is a happy number.

It is not a de Polignac number, because 20102102022121 - 2¹⁹ = 20102101497833 is a prime.

It is a super-2 number, since 2×20102102022121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102102022095 and 20102102022104.

It is not an unprimeable number, because it can be changed into a prime (20102102052121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2996285515 + ... + 2996292223.

It is an arithmetic number, because the mean of its divisors is an integer number (495956498400).

Almost surely, 2^{20102102022121} is an apocalyptic number.

It is an amenable number.

20102102022121 is a deficient number, since it is larger than the sum of its proper divisors (3703809901079).

20102102022121 is an equidigital number, since it uses as much as digits as its factorization.

20102102022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8618 (or 8545 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20102102022121 its reverse (12122020120102), we get a palindrome (32224122142223).

The spelling of 20102102022121 in words is "twenty trillion, one hundred two billion, one hundred two million, twenty-two thousand, one hundred twenty-one".