121899124 has 12 divisors (see below), whose sum is σ = 215523364. Its totient is φ = 60321024.

The previous prime is 121899121. The next prime is 121899143. The reversal of 121899124 is 421998121.

It can be written as a sum of positive squares in 2 ways, for example, as 92544400 + 29354724 = 9620^2 + 5418^2 .

It is a hoax number, since the sum of its digits (37) 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 (121899121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156699 + ... + 157474.

Almost surely, 2^121899124 is an apocalyptic number.

It is an amenable number.

121899124 is a deficient number, since it is larger than the sum of its proper divisors (93624240).

121899124 is a wasteful number, since it uses less digits than its factorization.

121899124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314274 (or 314272 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 121899124 is about 11040.7936308945. The cubic root of 121899124 is about 495.8308313568.

The spelling of 121899124 in words is "one hundred twenty-one million, eight hundred ninety-nine thousand, one hundred twenty-four".