131221312023 has 8 divisors (see below), whose sum is σ = 178684339968. Its totient is φ = 85619579384.

The previous prime is 131221312009. The next prime is 131221312073. The reversal of 131221312023 is 320213122131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131221312023 - 2⁹ = 131221311511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221312073) 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 7 ways as a sum of consecutive naturals, for example, 465323661 + ... + 465323942.

It is an arithmetic number, because the mean of its divisors is an integer number (22335542496).

Almost surely, 2^131221312023 is an apocalyptic number.

131221312023 is a deficient number, since it is larger than the sum of its proper divisors (47463027945).

131221312023 is an equidigital number, since it uses as much as digits as its factorization.

131221312023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930647653.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131221312023 its reverse (320213122131), we get a palindrome (451434434154).

The spelling of 131221312023 in words is "one hundred thirty-one billion, two hundred twenty-one million, three hundred twelve thousand, twenty-three".