222121131320 has 32 divisors (see below), whose sum is σ = 545206414320. Its totient is φ = 80771320320.

The previous prime is 222121131313. The next prime is 222121131343. The reversal of 222121131320 is 23131121222.

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 = 222121131292 and 222121131301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252409937 + ... + 252410816.

Almost surely, 2^222121131320 is an apocalyptic number.

222121131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121131320 is an abundant number, since it is smaller than the sum of its proper divisors (323085283000).

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

222121131320 is a wasteful number, since it uses less digits than its factorization.

222121131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504820775 (or 504820771 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 222121131320 its reverse (23131121222), we get a palindrome (245252252542).

The spelling of 222121131320 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty".