2021102122120 has 32 divisors (see below), whose sum is σ = 4609774024920. Its totient is φ = 797366315520.

The previous prime is 2021102122103. The next prime is 2021102122133. The reversal of 2021102122120 is 212212011202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1788965100484 + 232137021636 = 1337522^2 + 481806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021102122094 and 2021102122103.

It is an unprimeable number.

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, 346076211 + ... + 346082050.

Almost surely, 2^{2021102122120} is an apocalyptic number.

2021102122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021102122120 is an abundant number, since it is smaller than the sum of its proper divisors (2588671902800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021102122120 is a wasteful number, since it uses less digits than its factorization.

2021102122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692158345 (or 692158341 counting only the distinct ones).

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

Adding to 2021102122120 its reverse (212212011202), we get a palindrome (2233314133322).

The spelling of 2021102122120 in words is "two trillion, twenty-one billion, one hundred two million, one hundred twenty-two thousand, one hundred twenty".