121371939 has 36 divisors (see below), whose sum is σ = 196190176. Its totient is φ = 74637936.

The previous prime is 121371871. The next prime is 121371953. The reversal of 121371939 is 939173121.

It is a happy number.

It is not a de Polignac number, because 121371939 - 2¹³ = 121363747 is a prime.

It is a super-2 number, since 2×121371939² = 29462295153239442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121371539) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84582 + ... + 86004.

Almost surely, 2^121371939 is an apocalyptic number.

121371939 is a deficient number, since it is larger than the sum of its proper divisors (74818237).

121371939 is an frugal number, since it uses more digits than its factorization.

121371939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1439 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 121371939 is about 11016.8933461298. The cubic root of 121371939 is about 495.1150145963.

The spelling of 121371939 in words is "one hundred twenty-one million, three hundred seventy-one thousand, nine hundred thirty-nine".