21214523223 has 12 divisors (see below), whose sum is σ = 30644549208. Its totient is φ = 14142392880.

The previous prime is 21214523221. The next prime is 21214523233. The reversal of 21214523223 is 32232541212.

It is not a de Polignac number, because 21214523223 - 2¹ = 21214523221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214523221) 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 11 ways as a sum of consecutive naturals, for example, 267193 + ... + 337373.

It is an arithmetic number, because the mean of its divisors is an integer number (2553712434).

Almost surely, 2^21214523223 is an apocalyptic number.

21214523223 is a deficient number, since it is larger than the sum of its proper divisors (9430025985).

21214523223 is a wasteful number, since it uses less digits than its factorization.

21214523223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103774 (or 103771 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The spelling of 21214523223 in words is "twenty-one billion, two hundred fourteen million, five hundred twenty-three thousand, two hundred twenty-three".