121507131 has 8 divisors (see below), whose sum is σ = 162080080. Its totient is φ = 80969472.

The previous prime is 121507117. The next prime is 121507157. The reversal of 121507131 is 131705121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121507131 - 2²⁵ = 87952699 is a prime.

It is a super-2 number, since 2×121507131² = 29527965767702322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121507098 and 121507107.

It is not an unprimeable number, because it can be changed into a prime (121509131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675 + ... + 15603.

It is an arithmetic number, because the mean of its divisors is an integer number (20260010).

Almost surely, 2^121507131 is an apocalyptic number.

121507131 is a deficient number, since it is larger than the sum of its proper divisors (40572949).

121507131 is a wasteful number, since it uses less digits than its factorization.

121507131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17645.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 121507131 is about 11023.0273065070. The cubic root of 121507131 is about 495.2987768743.

The spelling of 121507131 in words is "one hundred twenty-one million, five hundred seven thousand, one hundred thirty-one".