21010122201023 has 32 divisors (see below), whose sum is σ = 23082867225600. Its totient is φ = 19055411481600.

The previous prime is 21010122201017. The next prime is 21010122201037. The reversal of 21010122201023 is 32010222101012.

It is a cyclic number.

It is not a de Polignac number, because 21010122201023 - 2²⁴ = 21010105423807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010122200992 and 21010122201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010122201823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8983943 + ... + 11078423.

It is an arithmetic number, because the mean of its divisors is an integer number (721339600800).

Almost surely, 2^{21010122201023} is an apocalyptic number.

21010122201023 is a deficient number, since it is larger than the sum of its proper divisors (2072745024577).

21010122201023 is a wasteful number, since it uses less digits than its factorization.

21010122201023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094783.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21010122201023 its reverse (32010222101012), we get a palindrome (53020344302035).

The spelling of 21010122201023 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, two hundred one thousand, twenty-three".