21202977223 has 16 divisors (see below), whose sum is σ = 21432039552. Its totient is φ = 20975724000.

The previous prime is 21202977221. The next prime is 21202977227. The reversal of 21202977223 is 32277920212.

It is a cyclic number.

It is not a de Polignac number, because 21202977223 - 2¹ = 21202977221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202977221) 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, 43183008 + ... + 43183498.

It is an arithmetic number, because the mean of its divisors is an integer number (1339502472).

Almost surely, 2^21202977223 is an apocalyptic number.

21202977223 is a deficient number, since it is larger than the sum of its proper divisors (229062329).

21202977223 is a wasteful number, since it uses less digits than its factorization.

21202977223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 21202977223 in words is "twenty-one billion, two hundred two million, nine hundred seventy-seven thousand, two hundred twenty-three".