121139937 has 6 divisors (see below), whose sum is σ = 174979922. Its totient is φ = 80759952.

The previous prime is 121139917. The next prime is 121139951. The reversal of 121139937 is 739931121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 117418896 + 3721041 = 10836^2 + 1929^2 .

It is not a de Polignac number, because 121139937 - 2¹² = 121135841 is a prime.

It is a super-3 number, since 3×121139937³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121139917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6729988 + ... + 6730005.

Almost surely, 2^121139937 is an apocalyptic number.

It is an amenable number.

121139937 is a deficient number, since it is larger than the sum of its proper divisors (53839985).

121139937 is a wasteful number, since it uses less digits than its factorization.

121139937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13459999 (or 13459996 counting only the distinct ones).

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

The square root of 121139937 is about 11006.3589347250. The cubic root of 121139937 is about 494.7993432198.

The spelling of 121139937 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, nine hundred thirty-seven".