121945149 has 32 divisors (see below), whose sum is σ = 190080000. Its totient is φ = 77117040.

The previous prime is 121945147. The next prime is 121945151. The reversal of 121945149 is 941549121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121945147) and next prime (121945151).

It is not a de Polignac number, because 121945149 - 2¹ = 121945147 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121945147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80602 + ... + 82100.

It is an arithmetic number, because the mean of its divisors is an integer number (5940000).

Almost surely, 2^121945149 is an apocalyptic number.

It is an amenable number.

121945149 is a deficient number, since it is larger than the sum of its proper divisors (68134851).

121945149 is a wasteful number, since it uses less digits than its factorization.

121945149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662 (or 1656 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 121945149 is about 11042.8777499346. The cubic root of 121945149 is about 495.8932265072.

The spelling of 121945149 in words is "one hundred twenty-one million, nine hundred forty-five thousand, one hundred forty-nine".