2102122212021 has 32 divisors (see below), whose sum is σ = 3530329712000. Its totient is φ = 1225528735104.

The previous prime is 2102122212007. The next prime is 2102122212023. The reversal of 2102122212021 is 1202122212012.

It is a happy number.

2102122212021 is a `hidden beast` number, since 210 + 212 + 221 + 2 + 0 + 21 = 666.

It is not a de Polignac number, because 2102122212021 - 2⁶ = 2102122211957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102122211985 and 2102122212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102122212023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157597336 + ... + 157610673.

It is an arithmetic number, because the mean of its divisors is an integer number (110322803500).

Almost surely, 2^{2102122212021} is an apocalyptic number.

It is an amenable number.

2102122212021 is a deficient number, since it is larger than the sum of its proper divisors (1428207499979).

2102122212021 is a wasteful number, since it uses less digits than its factorization.

2102122212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315208050 (or 315208044 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2102122212021 its reverse (1202122212012), we get a palindrome (3304244424033).

Subtracting from 2102122212021 its reverse (1202122212012), we obtain a palindrome (900000000009).

The spelling of 2102122212021 in words is "two trillion, one hundred two billion, one hundred twenty-two million, two hundred twelve thousand, twenty-one".