139121225499 has 16 divisors (see below), whose sum is σ = 189334301472. Its totient is φ = 90834102528.

The previous prime is 139121225479. The next prime is 139121225519. The reversal of 139121225499 is 994522121931.

It is an interprime number because it is at equal distance from previous prime (139121225479) and next prime (139121225519).

It is not a de Polignac number, because 139121225499 - 2⁹ = 139121224987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139121225479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696874 + ... + 873999.

It is an arithmetic number, because the mean of its divisors is an integer number (11833393842).

Almost surely, 2^139121225499 is an apocalyptic number.

139121225499 is a deficient number, since it is larger than the sum of its proper divisors (50213075973).

139121225499 is a wasteful number, since it uses less digits than its factorization.

139121225499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571486.

The product of its digits is 349920, while the sum is 48.

The spelling of 139121225499 in words is "one hundred thirty-nine billion, one hundred twenty-one million, two hundred twenty-five thousand, four hundred ninety-nine".