222121200121210 has 32 divisors (see below), whose sum is σ = 444462867942912. Its totient is φ = 79368369272640.

The previous prime is 222121200121207. The next prime is 222121200121229. The reversal of 222121200121210 is 12121002121222.

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, 27558457524 + ... + 27558465583.

It is an arithmetic number, because the mean of its divisors is an integer number (13889464623216).

Almost surely, 2^{222121200121210} is an apocalyptic number.

222121200121210 is an abundant number, since it is smaller than the sum of its proper divisors (222341667821702).

222121200121210 is a wasteful number, since it uses less digits than its factorization.

222121200121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55116923158.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222121200121210 its reverse (12121002121222), we get a palindrome (234242202242432).

It can be divided in two parts, 22212120012 and 1210, that added together give a palindrome (22212121222).

The spelling of 222121200121210 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-one thousand, two hundred ten".