121660231 has 8 divisors (see below), whose sum is σ = 151680384. Its totient is φ = 94800120.

The previous prime is 121660223. The next prime is 121660349. The reversal of 121660231 is 132066121.

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

It is a cyclic number.

It is not a de Polignac number, because 121660231 - 2³ = 121660223 is a prime.

It is a super-2 number, since 2×121660231² = 29602423613946722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121660531) 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, 789925 + ... + 790078.

It is an arithmetic number, because the mean of its divisors is an integer number (18960048).

Almost surely, 2^121660231 is an apocalyptic number.

121660231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121660231 is a deficient number, since it is larger than the sum of its proper divisors (30020153).

121660231 is a wasteful number, since it uses less digits than its factorization.

121660231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580021.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 121660231 is about 11029.9696735757. The cubic root of 121660231 is about 495.5067164289.

The spelling of 121660231 in words is "one hundred twenty-one million, six hundred sixty thousand, two hundred thirty-one".