31230223321221 has 8 divisors (see below), whose sum is σ = 46266997512960. Its totient is φ = 20820148880796.

The previous prime is 31230223321211. The next prime is 31230223321247. The reversal of 31230223321221 is 12212332203213.

31230223321221 is a `hidden beast` number, since 3 + 1 + 2 + 302 + 2 + 332 + 1 + 2 + 21 = 666.

It is not a de Polignac number, because 31230223321221 - 2¹⁴ = 31230223304837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1156674937823 = 31230223321221 / (3 + 1 + 2 + 3 + 0 + 2 + 2 + 3 + 3 + 2 + 1 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230223321211) 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, 578337468885 + ... + 578337468938.

It is an arithmetic number, because the mean of its divisors is an integer number (5783374689120).

Almost surely, 2^{31230223321221} is an apocalyptic number.

It is an amenable number.

31230223321221 is a deficient number, since it is larger than the sum of its proper divisors (15036774191739).

31230223321221 is a wasteful number, since it uses less digits than its factorization.

31230223321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156674937832 (or 1156674937826 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31230223321221 its reverse (12212332203213), we get a palindrome (43442555524434).

The spelling of 31230223321221 in words is "thirty-one trillion, two hundred thirty billion, two hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".