22121201212012 has 48 divisors (see below), whose sum is σ = 46173013286400. Its totient is φ = 9066937980672.

The previous prime is 22121201211929. The next prime is 22121201212049. The reversal of 22121201212012 is 21021210212122.

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, 1624239 + ... + 6846937.

It is an arithmetic number, because the mean of its divisors is an integer number (961937776800).

Almost surely, 2^{22121201212012} is an apocalyptic number.

It is an amenable number.

22121201212012 is an abundant number, since it is smaller than the sum of its proper divisors (24051812074388).

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

22121201212012 is a wasteful number, since it uses less digits than its factorization.

22121201212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5229310 (or 5229308 counting only the distinct ones).

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

Adding to 22121201212012 its reverse (21021210212122), we get a palindrome (43142411424134).

The spelling of 22121201212012 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, twelve".