2155122215512 has 64 divisors (see below), whose sum is σ = 4650578856000. Its totient is φ = 917153832960.

The previous prime is 2155122215509. The next prime is 2155122215581.

2155122215512 is nontrivially palindromic in base 10.

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, 4481328 + ... + 4938880.

It is an arithmetic number, because the mean of its divisors is an integer number (72665294625).

Almost surely, 2^{2155122215512} is an apocalyptic number.

It is an amenable number.

2155122215512 is an abundant number, since it is smaller than the sum of its proper divisors (2495456640488).

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

2155122215512 is a wasteful number, since it uses less digits than its factorization.

2155122215512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458156 (or 458152 counting only the distinct ones).

The product of its digits is 20000, while the sum is 34.

The spelling of 2155122215512 in words is "two trillion, one hundred fifty-five billion, one hundred twenty-two million, two hundred fifteen thousand, five hundred twelve".