2120131956 has 12 divisors (see below), whose sum is σ = 4946974592. Its totient is φ = 706710648.

The previous prime is 2120131907. The next prime is 2120131957. The reversal of 2120131956 is 6591310212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120131957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88338820 + ... + 88338843.

Almost surely, 2^2120131956 is an apocalyptic number.

It is an amenable number.

2120131956 is an abundant number, since it is smaller than the sum of its proper divisors (2826842636).

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

2120131956 is a wasteful number, since it uses less digits than its factorization.

2120131956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176677670 (or 176677668 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2120131956 is about 46044.8906611798. The cubic root of 2120131956 is about 1284.6583104386.

The spelling of 2120131956 in words is "two billion, one hundred twenty million, one hundred thirty-one thousand, nine hundred fifty-six".