222221221031 has 16 divisors (see below), whose sum is σ = 229338345600. Its totient is φ = 215224009728.

The previous prime is 222221220997. The next prime is 222221221043. The reversal of 222221221031 is 130122122222.

It is not a de Polignac number, because 222221221031 - 2²² = 222217026727 is a prime.

It is a super-2 number, since 2×222221221031² (a number of 23 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 = 222221220994 and 222221221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221221051) 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, 1944290 + ... + 2055408.

It is an arithmetic number, because the mean of its divisors is an integer number (14333646600).

Almost surely, 2^222221221031 is an apocalyptic number.

222221221031 is a deficient number, since it is larger than the sum of its proper divisors (7117124569).

222221221031 is a wasteful number, since it uses less digits than its factorization.

222221221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111658.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222221221031 its reverse (130122122222), we get a palindrome (352343343253).

The spelling of 222221221031 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, thirty-one".