2121002112120 has 32 divisors (see below), whose sum is σ = 6363006336720. Its totient is φ = 565600563200.

The previous prime is 2121002112107. The next prime is 2121002112157. The reversal of 2121002112120 is 212112001212.

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 2121002112120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8837508681 + ... + 8837508920.

Almost surely, 2^{2121002112120} is an apocalyptic number.

2121002112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121002112120 is an abundant number, since it is smaller than the sum of its proper divisors (4242004224600).

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

2121002112120 is a wasteful number, since it uses less digits than its factorization.

2121002112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17675017615 (or 17675017611 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121002112120 its reverse (212112001212), we get a palindrome (2333114113332).

The spelling of 2121002112120 in words is "two trillion, one hundred twenty-one billion, two million, one hundred twelve thousand, one hundred twenty".