22121320142 has 16 divisors (see below), whose sum is σ = 35881392960. Its totient is φ = 10188542208.

The previous prime is 22121320139. The next prime is 22121320153. The reversal of 22121320142 is 24102312122.

It is a congruent 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, 6919967 + ... + 6923162.

It is an arithmetic number, because the mean of its divisors is an integer number (2242587060).

Almost surely, 2^22121320142 is an apocalyptic number.

22121320142 is a deficient number, since it is larger than the sum of its proper divisors (13760072818).

22121320142 is a wasteful number, since it uses less digits than its factorization.

22121320142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13843195.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22121320142 its reverse (24102312122), we get a palindrome (46223632264).

The spelling of 22121320142 in words is "twenty-two billion, one hundred twenty-one million, three hundred twenty thousand, one hundred forty-two".