1121321031013 has 16 divisors (see below), whose sum is σ = 1138937572080. Its totient is φ = 1103831156736.

The previous prime is 1121321030993. The next prime is 1121321031031. The reversal of 1121321031013 is 3101301231211.

It can be written as a sum of positive squares in 8 ways, for example, as 541869709924 + 579451321089 = 736118^2 + 761217^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121321031013 - 2²⁹ = 1120784160101 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 (1121321035013) 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, 115203295 + ... + 115213027.

It is an arithmetic number, because the mean of its divisors is an integer number (71183598255).

Almost surely, 2^{1121321031013} is an apocalyptic number.

It is an amenable number.

1121321031013 is a deficient number, since it is larger than the sum of its proper divisors (17616541067).

1121321031013 is an equidigital number, since it uses as much as digits as its factorization.

1121321031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16056.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1121321031013 its reverse (3101301231211), we get a palindrome (4222622262224).

The spelling of 1121321031013 in words is "one trillion, one hundred twenty-one billion, three hundred twenty-one million, thirty-one thousand, thirteen".