121210231 has 2 divisors, whose sum is σ = 121210232. Its totient is φ = 121210230.

The previous prime is 121210213. The next prime is 121210237. The reversal of 121210231 is 132012121.

Together with previous prime (121210213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (132012121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121210231 - 2⁹ = 121209719 is a prime.

It is a super-2 number, since 2×121210231² = 29383840198146722, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605115 + 60605116.

It is an arithmetic number, because the mean of its divisors is an integer number (60605116).

Almost surely, 2^121210231 is an apocalyptic number.

121210231 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210231 is an equidigital number, since it uses as much as digits as its factorization.

121210231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121210231 is about 11009.5518074080. The cubic root of 121210231 is about 494.8950306276.

Adding to 121210231 its reverse (132012121), we get a palindrome (253222352).

The spelling of 121210231 in words is "one hundred twenty-one million, two hundred ten thousand, two hundred thirty-one".