21223665644122 has 8 divisors (see below), whose sum is σ = 32030808273216. Its totient is φ = 10546729553052.

The previous prime is 21223665644099. The next prime is 21223665644143. The reversal of 21223665644122 is 22144656632212.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 32551634098 + ... + 32551634749.

It is an arithmetic number, because the mean of its divisors is an integer number (4003851034152).

Almost surely, 2^{21223665644122} is an apocalyptic number.

21223665644122 is a deficient number, since it is larger than the sum of its proper divisors (10807142629094).

21223665644122 is a wasteful number, since it uses less digits than its factorization.

21223665644122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65103269012.

The product of its digits is 1658880, while the sum is 46.

The spelling of 21223665644122 in words is "twenty-one trillion, two hundred twenty-three billion, six hundred sixty-five million, six hundred forty-four thousand, one hundred twenty-two".