21222200723 has 8 divisors (see below), whose sum is σ = 21260700240. Its totient is φ = 21183729120.

The previous prime is 21222200707. The next prime is 21222200749. The reversal of 21222200723 is 32700222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222200723 - 2⁴ = 21222200707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020361 + ... + 2030837.

It is an arithmetic number, because the mean of its divisors is an integer number (2657587530).

Almost surely, 2^21222200723 is an apocalyptic number.

21222200723 is a deficient number, since it is larger than the sum of its proper divisors (38499517).

21222200723 is a wasteful number, since it uses less digits than its factorization.

21222200723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13957.

The product of its (nonzero) digits is 1344, while the sum is 23.

Adding to 21222200723 its reverse (32700222212), we get a palindrome (53922422935).

The spelling of 21222200723 in words is "twenty-one billion, two hundred twenty-two million, two hundred thousand, seven hundred twenty-three".