121013231 has 2 divisors, whose sum is σ = 121013232. Its totient is φ = 121013230.

The previous prime is 121013219. The next prime is 121013239. The reversal of 121013231 is 132310121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121013231 - 2¹⁰ = 121012207 is a prime.

It is a super-2 number, since 2×121013231² = 29288404154118722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121013239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506615 + 60506616.

It is an arithmetic number, because the mean of its divisors is an integer number (60506616).

Almost surely, 2^121013231 is an apocalyptic number.

121013231 is a deficient number, since it is larger than the sum of its proper divisors (1).

121013231 is an equidigital number, since it uses as much as digits as its factorization.

121013231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121013231 is about 11000.6013926512. The cubic root of 121013231 is about 494.6267716796.

Adding to 121013231 its reverse (132310121), we get a palindrome (253323352).

It can be divided in two parts, 1210 and 13231, that added together give a palindrome (14441).

The spelling of 121013231 in words is "one hundred twenty-one million, thirteen thousand, two hundred thirty-one".