2130167131721 has 4 divisors (see below), whose sum is σ = 2132460100500. Its totient is φ = 2127874162944.

The previous prime is 2130167131709. The next prime is 2130167131723. The reversal of 2130167131721 is 1271317610312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 381454464400 + 1748712667321 = 617620^2 + 1322389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130167131721 is a prime.

It is a super-2 number, since 2×2130167131721² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2130167131723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146482996 + ... + 1146484853.

It is an arithmetic number, because the mean of its divisors is an integer number (533115025125).

Almost surely, 2^{2130167131721} is an apocalyptic number.

It is an amenable number.

2130167131721 is a deficient number, since it is larger than the sum of its proper divisors (2292968779).

2130167131721 is an equidigital number, since it uses as much as digits as its factorization.

2130167131721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292968778.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 2130167131721 in words is "two trillion, one hundred thirty billion, one hundred sixty-seven million, one hundred thirty-one thousand, seven hundred twenty-one".