21010123212023 has 16 divisors (see below), whose sum is σ = 22953880465920. Its totient is φ = 19072001457600.

The previous prime is 21010123211981. The next prime is 21010123212047. The reversal of 21010123212023 is 32021232101012.

It is a cyclic number.

It is not a de Polignac number, because 21010123212023 - 2²⁰ = 21010122163447 is a prime.

It is a super-2 number, since 2×21010123212023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010123211986 and 21010123212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010123412023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37731236 + ... + 38284022.

It is an arithmetic number, because the mean of its divisors is an integer number (1434617529120).

Almost surely, 2^{21010123212023} is an apocalyptic number.

21010123212023 is a deficient number, since it is larger than the sum of its proper divisors (1943757253897).

21010123212023 is a wasteful number, since it uses less digits than its factorization.

21010123212023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557878.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21010123212023 its reverse (32021232101012), we get a palindrome (53031355313035).

The spelling of 21010123212023 in words is "twenty-one trillion, ten billion, one hundred twenty-three million, two hundred twelve thousand, twenty-three".