121531149 has 12 divisors (see below), whose sum is σ = 183177696. Its totient is φ = 77497992.

The previous prime is 121531127. The next prime is 121531153. The reversal of 121531149 is 941135121.

It is a happy number.

121531149 is a `hidden beast` number, since 121 + 531 + 1 + 4 + 9 = 666.

It is not a de Polignac number, because 121531149 - 2⁵ = 121531117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121531159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293347 + ... + 293760.

It is an arithmetic number, because the mean of its divisors is an integer number (15264808).

Almost surely, 2^121531149 is an apocalyptic number.

It is an amenable number.

121531149 is a deficient number, since it is larger than the sum of its proper divisors (61646547).

121531149 is a wasteful number, since it uses less digits than its factorization.

121531149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587136 (or 587133 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 121531149 is about 11024.1166993097. The cubic root of 121531149 is about 495.3314095333.

The spelling of 121531149 in words is "one hundred twenty-one million, five hundred thirty-one thousand, one hundred forty-nine".