21222311023 has 4 divisors (see below), whose sum is σ = 21232423800. Its totient is φ = 21212198248.

The previous prime is 21222310973. The next prime is 21222311027. The reversal of 21222311023 is 32011322212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21222311023 - 2⁹ = 21222310511 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 (21222311027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053240 + ... + 5057437.

It is an arithmetic number, because the mean of its divisors is an integer number (5308105950).

Almost surely, 2^21222311023 is an apocalyptic number.

21222311023 is a deficient number, since it is larger than the sum of its proper divisors (10112777).

21222311023 is a wasteful number, since it uses less digits than its factorization.

21222311023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112776.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222311023 its reverse (32011322212), we get a palindrome (53233633235).

The spelling of 21222311023 in words is "twenty-one billion, two hundred twenty-two million, three hundred eleven thousand, twenty-three".