222211212121120 has 24 divisors (see below), whose sum is σ = 524973988636524. Its totient is φ = 88884484848384.

The previous prime is 222211212121057. The next prime is 222211212121177. The reversal of 222211212121120 is 21121212112222.

It can be written as a sum of positive squares in 2 ways, for example, as 210961332642064 + 11249879479056 = 14524508^2 + 3354084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222211212121091 and 222211212121100.

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, 694410037719 + ... + 694410038038.

Almost surely, 2^{222211212121120} is an apocalyptic number.

222211212121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222211212121120 is an abundant number, since it is smaller than the sum of its proper divisors (302762776515404).

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

222211212121120 is a wasteful number, since it uses less digits than its factorization.

222211212121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388820075772 (or 1388820075764 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222211212121120 its reverse (21121212112222), we get a palindrome (243332424233342).

The spelling of 222211212121120 in words is "two hundred twenty-two trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twenty".