121613231 has 4 divisors (see below), whose sum is σ = 121647000. Its totient is φ = 121579464.

The previous prime is 121613203. The next prime is 121613267. The reversal of 121613231 is 132316121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121613231 - 2¹⁰ = 121612207 is a prime.

It is a super-2 number, since 2×121613231² = 29579555908518722, 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 (121613431) 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, 10736 + ... + 18933.

It is an arithmetic number, because the mean of its divisors is an integer number (30411750).

Almost surely, 2^121613231 is an apocalyptic number.

121613231 is a deficient number, since it is larger than the sum of its proper divisors (33769).

121613231 is an equidigital number, since it uses as much as digits as its factorization.

121613231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33768.

The product of its digits is 216, while the sum is 20.

The square root of 121613231 is about 11027.8389088706. The cubic root of 121613231 is about 495.4428998607.

Adding to 121613231 its reverse (132316121), we get a palindrome (253929352).

The spelling of 121613231 in words is "one hundred twenty-one million, six hundred thirteen thousand, two hundred thirty-one".