2121202020120 has 64 divisors (see below), whose sum is σ = 6363857305440. Its totient is φ = 565631539200.

The previous prime is 2121202020083. The next prime is 2121202020131. The reversal of 2121202020120 is 210202021212.

It is a super-2 number, since 2×2121202020120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2121202020120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2822730 + ... + 3494310.

Almost surely, 2^{2121202020120} is an apocalyptic number.

2121202020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121202020120 is an abundant number, since it is smaller than the sum of its proper divisors (4242655285320).

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

2121202020120 is a wasteful number, since it uses less digits than its factorization.

2121202020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697916 (or 697912 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121202020120 its reverse (210202021212), we get a palindrome (2331404041332).

The spelling of 2121202020120 in words is "two trillion, one hundred twenty-one billion, two hundred two million, twenty thousand, one hundred twenty".