21321101312313 has 32 divisors (see below), whose sum is σ = 31598847004032. Its totient is φ = 12677591347200.

The previous prime is 21321101312219. The next prime is 21321101312321. The reversal of 21321101312313 is 31321310112312.

It is not a de Polignac number, because 21321101312313 - 2¹² = 21321101308217 is a prime.

It is a super-2 number, since 2×21321101312313² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21321101312323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49072281 + ... + 49504857.

It is an arithmetic number, because the mean of its divisors is an integer number (987463968876).

Almost surely, 2^{21321101312313} is an apocalyptic number.

It is an amenable number.

21321101312313 is a deficient number, since it is larger than the sum of its proper divisors (10277745691719).

21321101312313 is a wasteful number, since it uses less digits than its factorization.

21321101312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460825.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21321101312313 its reverse (31321310112312), we get a palindrome (52642411424625).

The spelling of 21321101312313 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred one million, three hundred twelve thousand, three hundred thirteen".