222121111011220 has 48 divisors (see below), whose sum is σ = 467175216150720. Its totient is φ = 88711140901376.

The previous prime is 222121111011199. The next prime is 222121111011313. The reversal of 222121111011220 is 22110111121222.

It is a happy number.

222121111011220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513711639 + ... + 514143841.

It is an arithmetic number, because the mean of its divisors is an integer number (9732817003140).

Almost surely, 2^{222121111011220} is an apocalyptic number.

222121111011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121111011220 is an abundant number, since it is smaller than the sum of its proper divisors (245054105139500).

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

222121111011220 is a wasteful number, since it uses less digits than its factorization.

222121111011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471864 (or 471862 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222121111011220 its reverse (22110111121222), we get a palindrome (244231222132442).

The spelling of 222121111011220 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, eleven thousand, two hundred twenty".