22121012222212 has 12 divisors (see below), whose sum is σ = 38711804313420. Its totient is φ = 11060496704096.

The previous prime is 22121012222131. The next prime is 22121012222213. The reversal of 22121012222212 is 21222221012122.

It can be written as a sum of positive squares in 2 ways, for example, as 13272731366976 + 8848280855236 = 3643176^2 + 2974606^2 .

It is not an unprimeable number, because it can be changed into a prime (22121012222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131614 + ... + 10505482.

It is an arithmetic number, because the mean of its divisors is an integer number (3225983692785).

Almost surely, 2^{22121012222212} is an apocalyptic number.

It is an amenable number.

22121012222212 is a deficient number, since it is larger than the sum of its proper divisors (16590792091208).

22121012222212 is a wasteful number, since it uses less digits than its factorization.

22121012222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703510 (or 4703508 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22121012222212 its reverse (21222221012122), we get a palindrome (43343233234334).

The spelling of 22121012222212 in words is "twenty-two trillion, one hundred twenty-one billion, twelve million, two hundred twenty-two thousand, two hundred twelve".