22121021212012 has 12 divisors (see below), whose sum is σ = 39655977051096. Its totient is φ = 10790742054560.

The previous prime is 22121021212009. The next prime is 22121021212027. The reversal of 22121021212012 is 21021212012122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67442137678 + ... + 67442138005.

It is an arithmetic number, because the mean of its divisors is an integer number (3304664754258).

Almost surely, 2^{22121021212012} is an apocalyptic number.

It is an amenable number.

22121021212012 is a deficient number, since it is larger than the sum of its proper divisors (17534955839084).

22121021212012 is a wasteful number, since it uses less digits than its factorization.

22121021212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134884275728 (or 134884275726 counting only the distinct ones).

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

Adding to 22121021212012 its reverse (21021212012122), we get a palindrome (43142233224134).

The spelling of 22121021212012 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-one million, two hundred twelve thousand, twelve".