122121187 has 2 divisors, whose sum is σ = 122121188. Its totient is φ = 122121186.

The previous prime is 122121119. The next prime is 122121199. The reversal of 122121187 is 781121221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122121187 - 2¹¹ = 122119139 is a prime.

It is not a weakly prime, because it can be changed into another prime (122121107) 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, 61060593 + 61060594.

It is an arithmetic number, because the mean of its divisors is an integer number (61060594).

Almost surely, 2^122121187 is an apocalyptic number.

122121187 is a deficient number, since it is larger than the sum of its proper divisors (1).

122121187 is an equidigital number, since it uses as much as digits as its factorization.

122121187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 25.

The square root of 122121187 is about 11050.8455332612. The cubic root of 122121187 is about 496.1317328624.

The spelling of 122121187 in words is "one hundred twenty-two million, one hundred twenty-one thousand, one hundred eighty-seven".