120999891139 has 2 divisors, whose sum is σ = 120999891140. Its totient is φ = 120999891138.

The previous prime is 120999891127. The next prime is 120999891179. The reversal of 120999891139 is 931198999021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120999891139 - 2²⁵ = 120966336707 is a prime.

It is not a weakly prime, because it can be changed into another prime (120999891109) 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 as a sum of consecutive naturals, namely, 60499945569 + 60499945570.

It is an arithmetic number, because the mean of its divisors is an integer number (60499945570).

Almost surely, 2^120999891139 is an apocalyptic number.

120999891139 is a deficient number, since it is larger than the sum of its proper divisors (1).

120999891139 is an equidigital number, since it uses as much as digits as its factorization.

120999891139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 61.

The spelling of 120999891139 in words is "one hundred twenty billion, nine hundred ninety-nine million, eight hundred ninety-one thousand, one hundred thirty-nine".