222121102120 has 16 divisors (see below), whose sum is σ = 499772479860. Its totient is φ = 88848440832.

The previous prime is 222121102069. The next prime is 222121102183. The reversal of 222121102120 is 21201121222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 215420369956 + 6700732164 = 464134^2 + 81858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222121102094 and 222121102103.

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, 2776513737 + ... + 2776513816.

Almost surely, 2^222121102120 is an apocalyptic number.

222121102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121102120 is an abundant number, since it is smaller than the sum of its proper divisors (277651377740).

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

222121102120 is a wasteful number, since it uses less digits than its factorization.

222121102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553027564 (or 5553027560 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222121102120 its reverse (21201121222), we get a palindrome (243322223342).

It can be divided in two parts, 222121102 and 120, that added together give a palindrome (222121222).

The spelling of 222121102120 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty".