2123155512 has 48 divisors (see below), whose sum is σ = 5769003240. Its totient is φ = 705405888.

The previous prime is 2123155501. The next prime is 2123155547. The reversal of 2123155512 is 2155513212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25923 + ... + 70130.

Almost surely, 2^2123155512 is an apocalyptic number.

It is an amenable number.

2123155512 is an abundant number, since it is smaller than the sum of its proper divisors (3645847728).

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

2123155512 is a wasteful number, since it uses less digits than its factorization.

2123155512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96372 (or 96365 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 2123155512 is about 46077.7116619304. The cubic root of 2123155512 is about 1285.2687113360.

Adding to 2123155512 its reverse (2155513212), we get a palindrome (4278668724).

The spelling of 2123155512 in words is "two billion, one hundred twenty-three million, one hundred fifty-five thousand, five hundred twelve".