21022012323 has 16 divisors (see below), whose sum is σ = 33539393440. Its totient is φ = 12936622752.

The previous prime is 21022012313. The next prime is 21022012327. The reversal of 21022012323 is 32321022012.

21022012323 is a `hidden beast` number, since 210 + 220 + 1 + 232 + 3 = 666.

It is not a de Polignac number, because 21022012323 - 2¹⁰ = 21022011299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022012296 and 21022012305.

It is not an unprimeable number, because it can be changed into a prime (21022012327) 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, 29945536 + ... + 29946237.

It is an arithmetic number, because the mean of its divisors is an integer number (2096212090).

Almost surely, 2^21022012323 is an apocalyptic number.

21022012323 is a deficient number, since it is larger than the sum of its proper divisors (12517381117).

21022012323 is a wasteful number, since it uses less digits than its factorization.

21022012323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59891795 (or 59891789 counting only the distinct ones).

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

Adding to 21022012323 its reverse (32321022012), we get a palindrome (53343034335).

The spelling of 21022012323 in words is "twenty-one billion, twenty-two million, twelve thousand, three hundred twenty-three".