122505000139 has 2 divisors, whose sum is σ = 122505000140. Its totient is φ = 122505000138.

The previous prime is 122505000091. The next prime is 122505000157. The reversal of 122505000139 is 931000505221.

It is a strong prime.

It is an emirp because it is prime and its reverse (931000505221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122505000139 - 2¹⁹ = 122504475851 is a prime.

It is not a weakly prime, because it can be changed into another prime (122505000239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61252500069 + 61252500070.

It is an arithmetic number, because the mean of its divisors is an integer number (61252500070).

Almost surely, 2^122505000139 is an apocalyptic number.

122505000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

122505000139 is an equidigital number, since it uses as much as digits as its factorization.

122505000139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 122505000139 in words is "one hundred twenty-two billion, five hundred five million, one hundred thirty-nine", and thus it is an aban number.