22121251116 has 12 divisors (see below), whose sum is σ = 51616252632. Its totient is φ = 7373750368.

The previous prime is 22121251091. The next prime is 22121251129. The reversal of 22121251116 is 61115212122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 921718785 + ... + 921718808.

It is an arithmetic number, because the mean of its divisors is an integer number (4301354386).

Almost surely, 2^22121251116 is an apocalyptic number.

It is an amenable number.

22121251116 is an abundant number, since it is smaller than the sum of its proper divisors (29495001516).

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

22121251116 is a wasteful number, since it uses less digits than its factorization.

22121251116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843437600 (or 1843437598 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

Adding to 22121251116 its reverse (61115212122), we get a palindrome (83236463238).

The spelling of 22121251116 in words is "twenty-two billion, one hundred twenty-one million, two hundred fifty-one thousand, one hundred sixteen".