2131269621 has 16 divisors (see below), whose sum is σ = 3065530944. Its totient is φ = 1309302144.

The previous prime is 2131269619. The next prime is 2131269629. The reversal of 2131269621 is 1269621312.

It is not a de Polignac number, because 2131269621 - 2¹ = 2131269619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131269629) 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 15 ways as a sum of consecutive naturals, for example, 23656 + ... + 69441.

It is an arithmetic number, because the mean of its divisors is an integer number (191595684).

Almost surely, 2^2131269621 is an apocalyptic number.

It is an amenable number.

2131269621 is a deficient number, since it is larger than the sum of its proper divisors (934261323).

2131269621 is a wasteful number, since it uses less digits than its factorization.

2131269621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93700.

The product of its digits is 7776, while the sum is 33.

The square root of 2131269621 is about 46165.6757884037. The cubic root of 2131269621 is about 1286.9039429772.

The spelling of 2131269621 in words is "two billion, one hundred thirty-one million, two hundred sixty-nine thousand, six hundred twenty-one".