1313131020021 has 8 divisors (see below), whose sum is σ = 1945379288960. Its totient is φ = 875420679996.

The previous prime is 1313131020001. The next prime is 1313131020023. The reversal of 1313131020021 is 1200201313131.

1313131020021 is a `hidden beast` number, since 1 + 3 + 131 + 310 + 200 + 21 = 666.

It is not a de Polignac number, because 1313131020021 - 2¹⁸ = 1313130757877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313131019976 and 1313131020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313131020023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24317241085 + ... + 24317241138.

It is an arithmetic number, because the mean of its divisors is an integer number (243172411120).

Almost surely, 2^{1313131020021} is an apocalyptic number.

It is an amenable number.

1313131020021 is a deficient number, since it is larger than the sum of its proper divisors (632248268939).

1313131020021 is an equidigital number, since it uses as much as digits as its factorization.

1313131020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48634482232 (or 48634482226 counting only the distinct ones).

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

Adding to 1313131020021 its reverse (1200201313131), we get a palindrome (2513332333152).

The spelling of 1313131020021 in words is "one trillion, three hundred thirteen billion, one hundred thirty-one million, twenty thousand, twenty-one".