21022111400123 has 4 divisors (see below), whose sum is σ = 21105864832248. Its totient is φ = 20938357968000.

The previous prime is 21022111400077. The next prime is 21022111400179. The reversal of 21022111400123 is 32100411122012.

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 21022111400123 - 2³⁸ = 20747233493179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022111400095 and 21022111400104.

It is not an unprimeable number, because it can be changed into a prime (21022111490123) 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, 41876715686 + ... + 41876716187.

It is an arithmetic number, because the mean of its divisors is an integer number (5276466208062).

Almost surely, 2^{21022111400123} is an apocalyptic number.

21022111400123 is a deficient number, since it is larger than the sum of its proper divisors (83753432125).

21022111400123 is an equidigital number, since it uses as much as digits as its factorization.

21022111400123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83753432124.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21022111400123 its reverse (32100411122012), we get a palindrome (53122522522135).

The spelling of 21022111400123 in words is "twenty-one trillion, twenty-two billion, one hundred eleven million, four hundred thousand, one hundred twenty-three".