131232664261021 has 4 divisors (see below), whose sum is σ = 131232708986652. Its totient is φ = 131232619535392.

The previous prime is 131232664261009. The next prime is 131232664261093. The reversal of 131232664261021 is 120162466232131.

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 45270357305625 + 85962306955396 = 6728325^2 + 9271586^2 .

It is a cyclic number.

It is not a de Polignac number, because 131232664261021 - 2¹¹ = 131232664258973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131232664261001) 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, 17627296 + ... + 23941321.

It is an arithmetic number, because the mean of its divisors is an integer number (32808177246663).

Almost surely, 2^{131232664261021} is an apocalyptic number.

It is an amenable number.

131232664261021 is a deficient number, since it is larger than the sum of its proper divisors (44725631).

131232664261021 is an equidigital number, since it uses as much as digits as its factorization.

131232664261021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44725630.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 131232664261021 in words is "one hundred thirty-one trillion, two hundred thirty-two billion, six hundred sixty-four million, two hundred sixty-one thousand, twenty-one".