131203001205021 has 4 divisors (see below), whose sum is σ = 174937334940032. Its totient is φ = 87468667470012.

The previous prime is 131203001204987. The next prime is 131203001205037. The reversal of 131203001205021 is 120502100302131.

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 not a de Polignac number, because 131203001205021 - 2²² = 131202997010717 is a prime.

It is a super-2 number, since 2×131203001205021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131203001205041) 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, 21867166867501 + ... + 21867166867506.

It is an arithmetic number, because the mean of its divisors is an integer number (43734333735008).

Almost surely, 2^{131203001205021} is an apocalyptic number.

It is an amenable number.

131203001205021 is a deficient number, since it is larger than the sum of its proper divisors (43734333735011).

131203001205021 is an equidigital number, since it uses as much as digits as its factorization.

131203001205021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43734333735010.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 131203001205021 its reverse (120502100302131), we get a palindrome (251705101507152).

The spelling of 131203001205021 in words is "one hundred thirty-one trillion, two hundred three billion, one million, two hundred five thousand, twenty-one".