22121020210012 has 12 divisors (see below), whose sum is σ = 38935552914216. Its totient is φ = 10996576520240.

The previous prime is 22121020209907. The next prime is 22121020210019. The reversal of 22121020210012 is 21001202012122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121020210019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15983395414 + ... + 15983396797.

It is an arithmetic number, because the mean of its divisors is an integer number (3244629409518).

Almost surely, 2^{22121020210012} is an apocalyptic number.

It is an amenable number.

22121020210012 is a deficient number, since it is larger than the sum of its proper divisors (16814532704204).

22121020210012 is a wasteful number, since it uses less digits than its factorization.

22121020210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31966792388 (or 31966792386 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121020210012 its reverse (21001202012122), we get a palindrome (43122222222134).

The spelling of 22121020210012 in words is "twenty-two trillion, one hundred twenty-one billion, twenty million, two hundred ten thousand, twelve".