222321221031 has 16 divisors (see below), whose sum is σ = 364834824704. Its totient is φ = 117268336224.

The previous prime is 222321221027. The next prime is 222321221039. The reversal of 222321221031 is 130122123222.

It is not a de Polignac number, because 222321221031 - 2² = 222321221027 is a prime.

It is a super-2 number, since 2×222321221031² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 222321220989 and 222321221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222321221039) 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, 407181451 + ... + 407181996.

It is an arithmetic number, because the mean of its divisors is an integer number (22802176544).

Almost surely, 2^222321221031 is an apocalyptic number.

222321221031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

222321221031 is a deficient number, since it is larger than the sum of its proper divisors (142513603673).

222321221031 is a wasteful number, since it uses less digits than its factorization.

222321221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814363470.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 222321221031 its reverse (130122123222), we get a palindrome (352443344253).

The spelling of 222321221031 in words is "two hundred twenty-two billion, three hundred twenty-one million, two hundred twenty-one thousand, thirty-one".