2120115243556 has 12 divisors (see below), whose sum is σ = 3810477397468. Its totient is φ = 1031407415712.

The previous prime is 2120115243553. The next prime is 2120115243569. The reversal of 2120115243556 is 6553425110212.

It can be written as a sum of positive squares in 2 ways, for example, as 1620809072100 + 499306171456 = 1273110^2 + 706616^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (2120115243553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7162551351 + ... + 7162551646.

Almost surely, 2^{2120115243556} is an apocalyptic number.

It is an amenable number.

2120115243556 is a deficient number, since it is larger than the sum of its proper divisors (1690362153912).

2120115243556 is a wasteful number, since it uses less digits than its factorization.

2120115243556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14325103038 (or 14325103036 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 2120115243556 in words is "two trillion, one hundred twenty billion, one hundred fifteen million, two hundred forty-three thousand, five hundred fifty-six".