121042231 has 2 divisors, whose sum is σ = 121042232. Its totient is φ = 121042230.

The previous prime is 121042189. The next prime is 121042237. The reversal of 121042231 is 132240121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121042231 is a prime.

It is a super-2 number, since 2×121042231² = 29302443370914722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121042237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60521115 + 60521116.

It is an arithmetic number, because the mean of its divisors is an integer number (60521116).

Almost surely, 2^121042231 is an apocalyptic number.

121042231 is a deficient number, since it is larger than the sum of its proper divisors (1).

121042231 is an equidigital number, since it uses as much as digits as its factorization.

121042231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121042231 is about 11001.9194234461. The cubic root of 121042231 is about 494.6662798408. Note that the first 3 decimals are identical.

Adding to 121042231 its reverse (132240121), we get a palindrome (253282352).

The spelling of 121042231 in words is "one hundred twenty-one million, forty-two thousand, two hundred thirty-one".