131020203131321 has 16 divisors (see below), whose sum is σ = 156248073805824. Its totient is φ = 107420030790864.

The previous prime is 131020203131291. The next prime is 131020203131347. The reversal of 131020203131321 is 123131302020131.

It is a cyclic number.

It is not a de Polignac number, because 131020203131321 - 2¹⁴ = 131020203114937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (131020203131381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94275536 + ... + 95655198.

It is an arithmetic number, because the mean of its divisors is an integer number (9765504612864).

Almost surely, 2^{131020203131321} is an apocalyptic number.

It is an amenable number.

131020203131321 is a deficient number, since it is larger than the sum of its proper divisors (25227870674503).

131020203131321 is a wasteful number, since it uses less digits than its factorization.

131020203131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969540.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 131020203131321 its reverse (123131302020131), we get a palindrome (254151505151452).

The spelling of 131020203131321 in words is "one hundred thirty-one trillion, twenty billion, two hundred three million, one hundred thirty-one thousand, three hundred twenty-one".