121242631 has 2 divisors, whose sum is σ = 121242632. Its totient is φ = 121242630.

The previous prime is 121242587. The next prime is 121242661. The reversal of 121242631 is 136242121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121242631 - 2⁷ = 121242503 is a prime.

It is a super-3 number, since 3×121242631³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121242661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621315 + 60621316.

It is an arithmetic number, because the mean of its divisors is an integer number (60621316).

Almost surely, 2^121242631 is an apocalyptic number.

121242631 is a deficient number, since it is larger than the sum of its proper divisors (1).

121242631 is an equidigital number, since it uses as much as digits as its factorization.

121242631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 121242631 is about 11011.0231586352. The cubic root of 121242631 is about 494.9391225341.

Adding to 121242631 its reverse (136242121), we get a palindrome (257484752).

The spelling of 121242631 in words is "one hundred twenty-one million, two hundred forty-two thousand, six hundred thirty-one".