2120155512 has 32 divisors (see below), whose sum is σ = 5349022800. Its totient is φ = 700233984.

The previous prime is 2120155487. The next prime is 2120155523. The reversal of 2120155512 is 2155510212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402613 + ... + 407844.

Almost surely, 2^2120155512 is an apocalyptic number.

It is an amenable number.

2120155512 is an abundant number, since it is smaller than the sum of its proper divisors (3228867288).

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

2120155512 is a wasteful number, since it uses less digits than its factorization.

2120155512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810575 (or 810571 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2120155512 is about 46045.1464543224. The cubic root of 2120155512 is about 1284.6630682083.

Adding to 2120155512 its reverse (2155510212), we get a palindrome (4275665724).

The spelling of 2120155512 in words is "two billion, one hundred twenty million, one hundred fifty-five thousand, five hundred twelve".