21031301030313 has 16 divisors (see below), whose sum is σ = 32069662376960. Its totient is φ = 12009649214736.

The previous prime is 21031301030309. The next prime is 21031301030483. The reversal of 21031301030313 is 31303010313012.

It is not a de Polignac number, because 21031301030313 - 2² = 21031301030309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21031301030313.

It is not an unprimeable number, because it can be changed into a prime (21031301030213) 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, 343180645 + ... + 343241922.

It is an arithmetic number, because the mean of its divisors is an integer number (2004353898560).

Almost surely, 2^{21031301030313} is an apocalyptic number.

It is an amenable number.

21031301030313 is a deficient number, since it is larger than the sum of its proper divisors (11038361346647).

21031301030313 is a wasteful number, since it uses less digits than its factorization.

21031301030313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686424036.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21031301030313 its reverse (31303010313012), we get a palindrome (52334311343325).

The spelling of 21031301030313 in words is "twenty-one trillion, thirty-one billion, three hundred one million, thirty thousand, three hundred thirteen".