2130636121521 has 4 divisors (see below), whose sum is σ = 2840848162032. Its totient is φ = 1420424081012.

The previous prime is 2130636121513. The next prime is 2130636121547. The reversal of 2130636121521 is 1251216360312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2130636121521 - 2³ = 2130636121513 is a prime.

It is a super-2 number, since 2×2130636121521² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2130636121561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355106020251 + ... + 355106020256.

It is an arithmetic number, because the mean of its divisors is an integer number (710212040508).

Almost surely, 2^{2130636121521} is an apocalyptic number.

It is an amenable number.

2130636121521 is a deficient number, since it is larger than the sum of its proper divisors (710212040511).

2130636121521 is an equidigital number, since it uses as much as digits as its factorization.

2130636121521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710212040510.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 2130636121521 in words is "two trillion, one hundred thirty billion, six hundred thirty-six million, one hundred twenty-one thousand, five hundred twenty-one".