22121221242 has 16 divisors (see below), whose sum is σ = 45669618432. Its totient is φ = 7135877760.

The previous prime is 22121221223. The next prime is 22121221277. The reversal of 22121221242 is 24212212122.

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, 59465463 + ... + 59465834.

It is an arithmetic number, because the mean of its divisors is an integer number (2854351152).

Almost surely, 2^22121221242 is an apocalyptic number.

22121221242 is an abundant number, since it is smaller than the sum of its proper divisors (23548397190).

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

22121221242 is a wasteful number, since it uses less digits than its factorization.

22121221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118931333.

The product of its digits is 512, while the sum is 21.

Adding to 22121221242 its reverse (24212212122), we get a palindrome (46333433364).

The spelling of 22121221242 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-two".