2021212102120 has 16 divisors (see below), whose sum is σ = 4547727229860. Its totient is φ = 808484840832.

The previous prime is 2021212102093. The next prime is 2021212102141. The reversal of 2021212102120 is 212012121202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1842203569284 + 179008532836 = 1357278^2 + 423094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021212102094 and 2021212102103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25265151237 + ... + 25265151316.

Almost surely, 2^{2021212102120} is an apocalyptic number.

2021212102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021212102120 is an abundant number, since it is smaller than the sum of its proper divisors (2526515127740).

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

2021212102120 is a wasteful number, since it uses less digits than its factorization.

2021212102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50530302564 (or 50530302560 counting only the distinct ones).

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

Adding to 2021212102120 its reverse (212012121202), we get a palindrome (2233224223322).

The spelling of 2021212102120 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred two thousand, one hundred twenty".