121122139 has 2 divisors, whose sum is σ = 121122140. Its totient is φ = 121122138.

The previous prime is 121122107. The next prime is 121122151. The reversal of 121122139 is 931221121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121122139 - 2⁵ = 121122107 is a prime.

It is not a weakly prime, because it can be changed into another prime (121125139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561069 + 60561070.

It is an arithmetic number, because the mean of its divisors is an integer number (60561070).

Almost surely, 2^121122139 is an apocalyptic number.

121122139 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122139 is an equidigital number, since it uses as much as digits as its factorization.

121122139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 121122139 is about 11005.5503724257. The cubic root of 121122139 is about 494.7751098958.

The spelling of 121122139 in words is "one hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-nine".