131021031021 has 4 divisors (see below), whose sum is σ = 174694708032. Its totient is φ = 87347354012.

The previous prime is 131021030999. The next prime is 131021031073. The reversal of 131021031021 is 120130120131.

It is a happy number.

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 131021031021 - 2⁵ = 131021030989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021031821) 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 3 ways as a sum of consecutive naturals, for example, 21836838501 + ... + 21836838506.

It is an arithmetic number, because the mean of its divisors is an integer number (43673677008).

Almost surely, 2^131021031021 is an apocalyptic number.

It is an amenable number.

131021031021 is a deficient number, since it is larger than the sum of its proper divisors (43673677011).

131021031021 is an equidigital number, since it uses as much as digits as its factorization.

131021031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43673677010.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131021031021 its reverse (120130120131), we get a palindrome (251151151152).

The spelling of 131021031021 in words is "one hundred thirty-one billion, twenty-one million, thirty-one thousand, twenty-one".