1313113021 has 8 divisors (see below), whose sum is σ = 1432965600. Its totient is φ = 1193340240.

The previous prime is 1313112991. The next prime is 1313113073. The reversal of 1313113021 is 1203113131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313113021 - 2¹¹ = 1313110973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313112986 and 1313113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313113621) 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, 17535 + ... + 54163.

It is an arithmetic number, because the mean of its divisors is an integer number (179120700).

Almost surely, 2^1313113021 is an apocalyptic number.

1313113021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1313113021 is a deficient number, since it is larger than the sum of its proper divisors (119852579).

1313113021 is a wasteful number, since it uses less digits than its factorization.

1313113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39899.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1313113021 is about 36236.9013713921. The cubic root of 1313113021 is about 1095.0502179453.

Adding to 1313113021 its reverse (1203113131), we get a palindrome (2516226152).

The spelling of 1313113021 in words is "one billion, three hundred thirteen million, one hundred thirteen thousand, twenty-one".