210021112122222 has 32 divisors (see below), whose sum is σ = 420856313648544. Its totient is φ = 69871360832000.

The previous prime is 210021112122203. The next prime is 210021112122313. The reversal of 210021112122222 is 222221211120012.

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, 174446722 + ... + 175646522.

It is an arithmetic number, because the mean of its divisors is an integer number (13151759801517).

Almost surely, 2^{210021112122222} is an apocalyptic number.

210021112122222 is an abundant number, since it is smaller than the sum of its proper divisors (210835201526322).

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

210021112122222 is a wasteful number, since it uses less digits than its factorization.

210021112122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256324.

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

Adding to 210021112122222 its reverse (222221211120012), we get a palindrome (432242323242234).

The spelling of 210021112122222 in words is "two hundred ten trillion, twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twenty-two".