20312222123 has 2 divisors, whose sum is σ = 20312222124. Its totient is φ = 20312222122.

The previous prime is 20312222113. The next prime is 20312222129. The reversal of 20312222123 is 32122221302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20312222123 - 2¹⁸ = 20311959979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20312222095 and 20312222104.

It is not a weakly prime, because it can be changed into another prime (20312222129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156111061 + 10156111062.

It is an arithmetic number, because the mean of its divisors is an integer number (10156111062).

Almost surely, 2^20312222123 is an apocalyptic number.

20312222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312222123 is an equidigital number, since it uses as much as digits as its factorization.

20312222123 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20312222123 its reverse (32122221302), we get a palindrome (52434443425).

The spelling of 20312222123 in words is "twenty billion, three hundred twelve million, two hundred twenty-two thousand, one hundred twenty-three".