22121022212 has 24 divisors (see below), whose sum is σ = 38815295904. Its totient is φ = 11030976512.

The previous prime is 22121022167. The next prime is 22121022221. The reversal of 22121022212 is 21222012122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2783108 + ... + 2791044.

It is an arithmetic number, because the mean of its divisors is an integer number (1617303996).

Almost surely, 2^22121022212 is an apocalyptic number.

It is an amenable number.

22121022212 is a deficient number, since it is larger than the sum of its proper divisors (16694273692).

22121022212 is a wasteful number, since it uses less digits than its factorization.

22121022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715 (or 9713 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22121022212 its reverse (21222012122), we get a palindrome (43343034334).

The spelling of 22121022212 in words is "twenty-two billion, one hundred twenty-one million, twenty-two thousand, two hundred twelve".