21667122227123 has 4 divisors (see below), whose sum is σ = 21796865474160. Its totient is φ = 21537378980088.

The previous prime is 21667122227117. The next prime is 21667122227167. The reversal of 21667122227123 is 32172222176612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21667122227123 - 2⁶ = 21667122227059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21667122527123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64871623268 + ... + 64871623601.

It is an arithmetic number, because the mean of its divisors is an integer number (5449216368540).

Almost surely, 2^{21667122227123} is an apocalyptic number.

21667122227123 is a deficient number, since it is larger than the sum of its proper divisors (129743247037).

21667122227123 is a wasteful number, since it uses less digits than its factorization.

21667122227123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129743247036.

The product of its digits is 338688, while the sum is 44.

The spelling of 21667122227123 in words is "twenty-one trillion, six hundred sixty-seven billion, one hundred twenty-two million, two hundred twenty-seven thousand, one hundred twenty-three".