20102312123 has 2 divisors, whose sum is σ = 20102312124. Its totient is φ = 20102312122.

The previous prime is 20102312119. The next prime is 20102312129. The reversal of 20102312123 is 32121320102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20102312123 - 2² = 20102312119 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102312129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051156061 + 10051156062.

It is an arithmetic number, because the mean of its divisors is an integer number (10051156062).

Almost surely, 2^20102312123 is an apocalyptic number.

20102312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102312123 is an equidigital number, since it uses as much as digits as its factorization.

20102312123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20102312123 its reverse (32121320102), we get a palindrome (52223632225).

The spelling of 20102312123 in words is "twenty billion, one hundred two million, three hundred twelve thousand, one hundred twenty-three".