121186139 has 2 divisors, whose sum is σ = 121186140. Its totient is φ = 121186138.

The previous prime is 121186129. The next prime is 121186141. The reversal of 121186139 is 931681121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121186139 - 2¹² = 121182043 is a prime.

Together with 121186141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121186129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60593069 + 60593070.

It is an arithmetic number, because the mean of its divisors is an integer number (60593070).

Almost surely, 2^121186139 is an apocalyptic number.

121186139 is a deficient number, since it is larger than the sum of its proper divisors (1).

121186139 is an equidigital number, since it uses as much as digits as its factorization.

121186139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 32.

The square root of 121186139 is about 11008.4576122180. The cubic root of 121186139 is about 494.8622396632.

The spelling of 121186139 in words is "one hundred twenty-one million, one hundred eighty-six thousand, one hundred thirty-nine".