31221011300223 has 8 divisors (see below), whose sum is σ = 41718314450736. Its totient is φ = 20768857841600.

The previous prime is 31221011300209. The next prime is 31221011300231. The reversal of 31221011300223 is 32200311012213.

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 31221011300223 - 2²⁰ = 31221010251647 is a prime.

It is a super-2 number, since 2×31221011300223² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31221011300223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221011300243) 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, 11287421358 + ... + 11287424123.

It is an arithmetic number, because the mean of its divisors is an integer number (5214789306342).

Almost surely, 2^{31221011300223} is an apocalyptic number.

31221011300223 is a deficient number, since it is larger than the sum of its proper divisors (10497303150513).

31221011300223 is a wasteful number, since it uses less digits than its factorization.

31221011300223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22574845945.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31221011300223 its reverse (32200311012213), we get a palindrome (63421322312436).

The spelling of 31221011300223 in words is "thirty-one trillion, two hundred twenty-one billion, eleven million, three hundred thousand, two hundred twenty-three".