222121531420 has 12 divisors (see below), whose sum is σ = 466455216024. Its totient is φ = 88848612560.

The previous prime is 222121531399. The next prime is 222121531477. The reversal of 222121531420 is 24135121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553038266 + ... + 5553038305.

It is an arithmetic number, because the mean of its divisors is an integer number (38871268002).

Almost surely, 2^222121531420 is an apocalyptic number.

222121531420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121531420 is an abundant number, since it is smaller than the sum of its proper divisors (244333684604).

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

222121531420 is a wasteful number, since it uses less digits than its factorization.

222121531420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11106076580 (or 11106076578 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 222121531420 its reverse (24135121222), we get a palindrome (246256652642).

The spelling of 222121531420 in words is "two hundred twenty-two billion, one hundred twenty-one million, five hundred thirty-one thousand, four hundred twenty".