20312221223 has 12 divisors (see below), whose sum is σ = 23689266120. Its totient is φ = 17365702032.

The previous prime is 20312221217. The next prime is 20312221229. The reversal of 20312221223 is 32212221302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20312221217) and next prime (20312221229).

It is not a de Polignac number, because 20312221223 - 2⁴ = 20312221207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312221195 and 20312221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312221229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513761 + ... + 551882.

It is an arithmetic number, because the mean of its divisors is an integer number (1974105510).

Almost surely, 2^20312221223 is an apocalyptic number.

20312221223 is a deficient number, since it is larger than the sum of its proper divisors (3377044897).

20312221223 is a wasteful number, since it uses less digits than its factorization.

20312221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066046 (or 1066039 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20312221223 its reverse (32212221302), we get a palindrome (52524442525).

The spelling of 20312221223 in words is "twenty billion, three hundred twelve million, two hundred twenty-one thousand, two hundred twenty-three".