22121212112202 has 32 divisors (see below), whose sum is σ = 53537051164032. Its totient is φ = 5948561240064.

The previous prime is 22121212112189. The next prime is 22121212112257. The reversal of 22121212112202 is 20221121212122.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 15491044183 + ... + 15491045610.

It is an arithmetic number, because the mean of its divisors is an integer number (1673032848876).

Almost surely, 2^{22121212112202} is an apocalyptic number.

22121212112202 is an abundant number, since it is smaller than the sum of its proper divisors (31415839051830).

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

22121212112202 is a wasteful number, since it uses less digits than its factorization.

22121212112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30982089822.

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

Adding to 22121212112202 its reverse (20221121212122), we get a palindrome (42342333324324).

The spelling of 22121212112202 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, two hundred two".