20122123139 has 2 divisors, whose sum is σ = 20122123140. Its totient is φ = 20122123138.

The previous prime is 20122123127. The next prime is 20122123141. The reversal of 20122123139 is 93132122102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20122123139 - 2⁴ = 20122123123 is a prime.

It is a super-3 number, since 3×20122123139³ (a number of 32 digits) contains 333 as substring.

Together with 20122123141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20122123159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061061569 + 10061061570.

It is an arithmetic number, because the mean of its divisors is an integer number (10061061570).

Almost surely, 2^20122123139 is an apocalyptic number.

20122123139 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122123139 is an equidigital number, since it uses as much as digits as its factorization.

20122123139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 20122123139 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-three thousand, one hundred thirty-nine".