2121312033120 has 96 divisors (see below), whose sum is σ = 7636723331328. Its totient is φ = 484871321088.

The previous prime is 2121312033091. The next prime is 2121312033133. The reversal of 2121312033120 is 213302131212.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 315668074 + ... + 315674793.

It is an arithmetic number, because the mean of its divisors is an integer number (79549201368).

Almost surely, 2^{2121312033120} is an apocalyptic number.

2121312033120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121312033120 is an abundant number, since it is smaller than the sum of its proper divisors (5515411298208).

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

2121312033120 is a wasteful number, since it uses less digits than its factorization.

2121312033120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631342892 (or 631342884 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2121312033120 its reverse (213302131212), we get a palindrome (2334614164332).

The spelling of 2121312033120 in words is "two trillion, one hundred twenty-one billion, three hundred twelve million, thirty-three thousand, one hundred twenty".