1313311233021 has 16 divisors (see below), whose sum is σ = 1770988665600. Its totient is φ = 865589888768.

The previous prime is 1313311232969. The next prime is 1313311233029. The reversal of 1313311233021 is 1203321133131.

It is a cyclic number.

It is not a de Polignac number, because 1313311233021 - 2³⁰ = 1312237491197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313311232982 and 1313311233000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313311233029) 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, 1744825 + ... + 2381393.

It is an arithmetic number, because the mean of its divisors is an integer number (110686791600).

Almost surely, 2^{1313311233021} is an apocalyptic number.

It is an amenable number.

1313311233021 is a deficient number, since it is larger than the sum of its proper divisors (457677432579).

1313311233021 is an equidigital number, since it uses as much as digits as its factorization.

1313311233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644388.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1313311233021 its reverse (1203321133131), we get a palindrome (2516632366152).

The spelling of 1313311233021 in words is "one trillion, three hundred thirteen billion, three hundred eleven million, two hundred thirty-three thousand, twenty-one".