21313120032031 has 16 divisors (see below), whose sum is σ = 22660409746944. Its totient is φ = 20000917434784.

The previous prime is 21313120031999. The next prime is 21313120032041. The reversal of 21313120032031 is 13023002131312.

It is a cyclic number.

It is not a de Polignac number, because 21313120032031 - 2⁵ = 21313120031999 is a prime.

It is a super-2 number, since 2×21313120032031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313120031993 and 21313120032011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313120032041) 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, 27690270 + ... + 28449556.

It is an arithmetic number, because the mean of its divisors is an integer number (1416275609184).

Almost surely, 2^{21313120032031} is an apocalyptic number.

21313120032031 is a deficient number, since it is larger than the sum of its proper divisors (1347289714913).

21313120032031 is a wasteful number, since it uses less digits than its factorization.

21313120032031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782390.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21313120032031 its reverse (13023002131312), we get a palindrome (34336122163343).

The spelling of 21313120032031 in words is "twenty-one trillion, three hundred thirteen billion, one hundred twenty million, thirty-two thousand, thirty-one".