1321011022131 has 20 divisors (see below), whose sum is σ = 1973959267192. Its totient is φ = 880407530208.

The previous prime is 1321011022099. The next prime is 1321011022141. The reversal of 1321011022131 is 1312201101231.

It is not a de Polignac number, because 1321011022131 - 2⁵ = 1321011022099 is a prime.

It is a super-2 number, since 2×1321011022131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321011022141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2197930 + ... + 2733663.

Almost surely, 2^{1321011022131} is an apocalyptic number.

1321011022131 is a deficient number, since it is larger than the sum of its proper divisors (652948245061).

1321011022131 is an equidigital number, since it uses as much as digits as its factorization.

1321011022131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934912 (or 4934903 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1321011022131 its reverse (1312201101231), we get a palindrome (2633212123362).

The spelling of 1321011022131 in words is "one trillion, three hundred twenty-one billion, eleven million, twenty-two thousand, one hundred thirty-one".