22121303431242 has 16 divisors (see below), whose sum is σ = 44452287466272. Its totient is φ = 7338821043120.

The previous prime is 22121303431217. The next prime is 22121303431273. The reversal of 22121303431242 is 24213430312122.

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, 8736690453 + ... + 8736692984.

It is an arithmetic number, because the mean of its divisors is an integer number (2778267966642).

Almost surely, 2^{22121303431242} is an apocalyptic number.

22121303431242 is an abundant number, since it is smaller than the sum of its proper divisors (22330984035030).

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

22121303431242 is a wasteful number, since it uses less digits than its factorization.

22121303431242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17473383653.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 22121303431242 its reverse (24213430312122), we get a palindrome (46334733743364).

The spelling of 22121303431242 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred three million, four hundred thirty-one thousand, two hundred forty-two".