131301131211021 has 4 divisors (see below), whose sum is σ = 175068174948032. Its totient is φ = 87534087474012.

The previous prime is 131301131210999. The next prime is 131301131211037. The reversal of 131301131211021 is 120112131103131.

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 131301131211021 - 2⁵ = 131301131210989 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 (131301131218021) 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, 21883521868501 + ... + 21883521868506.

It is an arithmetic number, because the mean of its divisors is an integer number (43767043737008).

Almost surely, 2^{131301131211021} is an apocalyptic number.

It is an amenable number.

131301131211021 is a deficient number, since it is larger than the sum of its proper divisors (43767043737011).

131301131211021 is an equidigital number, since it uses as much as digits as its factorization.

131301131211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43767043737010.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 131301131211021 its reverse (120112131103131), we get a palindrome (251413262314152).

The spelling of 131301131211021 in words is "one hundred thirty-one trillion, three hundred one billion, one hundred thirty-one million, two hundred eleven thousand, twenty-one".