1313001231021 has 48 divisors (see below), whose sum is σ = 1971418176000. Its totient is φ = 873281564928.

The previous prime is 1313001231011. The next prime is 1313001231023. The reversal of 1313001231021 is 1201321003131.

1313001231021 is a `hidden beast` number, since 1 + 31 + 300 + 1 + 2 + 310 + 21 = 666.

It is not a de Polignac number, because 1313001231021 - 2³⁴ = 1295821361837 is a prime.

It is a super-2 number, since 2×1313001231021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1313001230985 and 1313001231003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313001231023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206216580 + ... + 206222946.

It is an arithmetic number, because the mean of its divisors is an integer number (41071212000).

Almost surely, 2^{1313001231021} is an apocalyptic number.

It is an amenable number.

1313001231021 is a deficient number, since it is larger than the sum of its proper divisors (658416944979).

1313001231021 is an equidigital number, since it uses as much as digits as its factorization.

1313001231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8240 (or 8228 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1313001231021 its reverse (1201321003131), we get a palindrome (2514322234152).

The spelling of 1313001231021 in words is "one trillion, three hundred thirteen billion, one million, two hundred thirty-one thousand, twenty-one".