1200001000139 has 2 divisors, whose sum is σ = 1200001000140. Its totient is φ = 1200001000138.

The previous prime is 1200001000109. The next prime is 1200001000207. The reversal of 1200001000139 is 9310001000021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200001000139 - 2³⁶ = 1131281523403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200001000109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600000500069 + 600000500070.

It is an arithmetic number, because the mean of its divisors is an integer number (600000500070).

Almost surely, 2^{1200001000139} is an apocalyptic number.

1200001000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200001000139 is an equidigital number, since it uses as much as digits as its factorization.

1200001000139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 1200001000139 in words is "one trillion, two hundred billion, one million, one hundred thirty-nine", and thus it is an aban number.