2130255561621 has 16 divisors (see below), whose sum is σ = 3233273264640. Its totient is φ = 1234930759920.

The previous prime is 2130255561617. The next prime is 2130255561641. The reversal of 2130255561621 is 1261655520312.

It is not a de Polignac number, because 2130255561621 - 2² = 2130255561617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2130255561621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130255561601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1403329651 + ... + 1403331168.

It is an arithmetic number, because the mean of its divisors is an integer number (202079579040).

Almost surely, 2^{2130255561621} is an apocalyptic number.

It is an amenable number.

2130255561621 is a deficient number, since it is larger than the sum of its proper divisors (1103017703019).

2130255561621 is a wasteful number, since it uses less digits than its factorization.

2130255561621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806660856.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 2130255561621 in words is "two trillion, one hundred thirty billion, two hundred fifty-five million, five hundred sixty-one thousand, six hundred twenty-one".