222121210220 has 96 divisors (see below), whose sum is σ = 587449218048. Its totient is φ = 68662847232.

The previous prime is 222121210217. The next prime is 222121210253. The reversal of 222121210220 is 22012121222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1340864 + ... + 1497383.

It is an arithmetic number, because the mean of its divisors is an integer number (6119262688).

Almost surely, 2^222121210220 is an apocalyptic number.

222121210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121210220 is an abundant number, since it is smaller than the sum of its proper divisors (365328007828).

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

222121210220 is a wasteful number, since it uses less digits than its factorization.

222121210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838319 (or 2838317 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222121210220 its reverse (22012121222), we get a palindrome (244133331442).

The spelling of 222121210220 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty".