22121013223642 has 16 divisors (see below), whose sum is σ = 33555415380480. Its totient is φ = 10935882685728.

The previous prime is 22121013223601. The next prime is 22121013223693. The reversal of 22121013223642 is 24632231012122.

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, 3664903 + ... + 7594309.

It is an arithmetic number, because the mean of its divisors is an integer number (2097213461280).

Almost surely, 2^{22121013223642} is an apocalyptic number.

22121013223642 is a deficient number, since it is larger than the sum of its proper divisors (11434402156838).

22121013223642 is a wasteful number, since it uses less digits than its factorization.

22121013223642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961125.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 22121013223642 its reverse (24632231012122), we get a palindrome (46753244235764).

The spelling of 22121013223642 in words is "twenty-two trillion, one hundred twenty-one billion, thirteen million, two hundred twenty-three thousand, six hundred forty-two".