121612231 has 6 divisors (see below), whose sum is σ = 131686800. Its totient is φ = 112257288.

The previous prime is 121612207. The next prime is 121612259. The reversal of 121612231 is 132216121.

It is not a de Polignac number, because 121612231 - 2⁹ = 121611719 is a prime.

It is a super-2 number, since 2×121612231² = 29579069457594722, 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 = 121612199 and 121612208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121412231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359631 + ... + 359968.

It is an arithmetic number, because the mean of its divisors is an integer number (21947800).

Almost surely, 2^121612231 is an apocalyptic number.

121612231 is a deficient number, since it is larger than the sum of its proper divisors (10074569).

121612231 is an equidigital number, since it uses as much as digits as its factorization.

121612231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719625 (or 719612 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 121612231 is about 11027.7935689783. The cubic root of 121612231 is about 495.4415418827.

Adding to 121612231 its reverse (132216121), we get a palindrome (253828352).

The spelling of 121612231 in words is "one hundred twenty-one million, six hundred twelve thousand, two hundred thirty-one".