222131212220 has 24 divisors (see below), whose sum is σ = 470603652624. Its totient is φ = 88066178816.

The previous prime is 222131212207. The next prime is 222131212229. The reversal of 222131212220 is 22212131222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222131212192 and 222131212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131212229) 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, 49141814 + ... + 49146333.

It is an arithmetic number, because the mean of its divisors is an integer number (19608485526).

Almost surely, 2^222131212220 is an apocalyptic number.

222131212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222131212220 is an abundant number, since it is smaller than the sum of its proper divisors (248472440404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222131212220 is a wasteful number, since it uses less digits than its factorization.

222131212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98288269 (or 98288267 counting only the distinct ones).

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

Adding to 222131212220 its reverse (22212131222), we get a palindrome (244343343442).

The spelling of 222131212220 in words is "two hundred twenty-two billion, one hundred thirty-one million, two hundred twelve thousand, two hundred twenty".