2155102969012 has 24 divisors (see below), whose sum is σ = 4310472531456. Its totient is φ = 923558431008.

The previous prime is 2155102968979. The next prime is 2155102969087. The reversal of 2155102969012 is 2109692015512.

It is a happy number.

It is a super-2 number, since 2×2155102969012² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2155102969012.

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, 1917943 + ... + 2826430.

It is an arithmetic number, because the mean of its divisors is an integer number (179603022144).

Almost surely, 2^{2155102969012} is an apocalyptic number.

It is an amenable number.

2155102969012 is an abundant number, since it is smaller than the sum of its proper divisors (2155369562444).

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

2155102969012 is a wasteful number, since it uses less digits than its factorization.

2155102969012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760607 (or 4760605 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 2155102969012 in words is "two trillion, one hundred fifty-five billion, one hundred two million, nine hundred sixty-nine thousand, twelve".