222221210121210 has 32 divisors (see below), whose sum is σ = 534723413207040. Its totient is φ = 59104266152768.

The previous prime is 222221210121167. The next prime is 222221210121241. The reversal of 222221210121210 is 12121012122222.

It is a Curzon 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, 9670189125 + ... + 9670212104.

It is an arithmetic number, because the mean of its divisors is an integer number (16710106662720).

Almost surely, 2^{222221210121210} is an apocalyptic number.

222221210121210 is an abundant number, since it is smaller than the sum of its proper divisors (312502203085830).

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

222221210121210 is a wasteful number, since it uses less digits than its factorization.

222221210121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19340401622.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222221210121210 its reverse (12121012122222), we get a palindrome (234342222243432).

It can be divided in two parts, 22222121012 and 1210, that added together give a palindrome (22222122222).

The spelling of 222221210121210 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, two hundred ten".