21000023022123 has 10 divisors (see below), whose sum is σ = 31370404761564. Its totient is φ = 14000015348028.

The previous prime is 21000023022101. The next prime is 21000023022127. The reversal of 21000023022123 is 32122032000012.

21000023022123 is a `hidden beast` number, since 210 + 0 + 0 + 0 + 230 + 221 + 2 + 3 = 666.

It is not a de Polignac number, because 21000023022123 - 2⁶ = 21000023022059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000023022096 and 21000023022105.

It is not an unprimeable number, because it can be changed into a prime (21000023022127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 129629771661 + ... + 129629771822.

Almost surely, 2^{21000023022123} is an apocalyptic number.

21000023022123 is a deficient number, since it is larger than the sum of its proper divisors (10370381739441).

21000023022123 is an equidigital number, since it uses as much as digits as its factorization.

21000023022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259259543495 (or 259259543486 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21000023022123 its reverse (32122032000012), we get a palindrome (53122055022135).

The spelling of 21000023022123 in words is "twenty-one trillion, twenty-three million, twenty-two thousand, one hundred twenty-three".