21023323101 has 24 divisors (see below), whose sum is σ = 33670746720. Its totient is φ = 12532528800.

The previous prime is 21023323093. The next prime is 21023323141. The reversal of 21023323101 is 10132332012.

21023323101 is a `hidden beast` number, since 21 + 0 + 2 + 332 + 310 + 1 = 666.

It is not a de Polignac number, because 21023323101 - 2³ = 21023323093 is a prime.

It is a super-2 number, since 2×21023323101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023323141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1734591 + ... + 1746668.

It is an arithmetic number, because the mean of its divisors is an integer number (1402947780).

Almost surely, 2^21023323101 is an apocalyptic number.

It is an amenable number.

21023323101 is a deficient number, since it is larger than the sum of its proper divisors (12647423619).

21023323101 is a wasteful number, since it uses less digits than its factorization.

21023323101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3481337 (or 3481334 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023323101 its reverse (10132332012), we get a palindrome (31155655113).

The spelling of 21023323101 in words is "twenty-one billion, twenty-three million, three hundred twenty-three thousand, one hundred one".