121054139 has 2 divisors, whose sum is σ = 121054140. Its totient is φ = 121054138.

The previous prime is 121054097. The next prime is 121054169. The reversal of 121054139 is 931450121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121054139 - 2¹² = 121050043 is a prime.

It is not a weakly prime, because it can be changed into another prime (121054169) 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, 60527069 + 60527070.

It is an arithmetic number, because the mean of its divisors is an integer number (60527070).

Almost surely, 2^121054139 is an apocalyptic number.

121054139 is a deficient number, since it is larger than the sum of its proper divisors (1).

121054139 is an equidigital number, since it uses as much as digits as its factorization.

121054139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 121054139 is about 11002.4605884320. The cubic root of 121054139 is about 494.6825008816.

The spelling of 121054139 in words is "one hundred twenty-one million, fifty-four thousand, one hundred thirty-nine".