121124551 has 2 divisors, whose sum is σ = 121124552. Its totient is φ = 121124550.

The previous prime is 121124527. The next prime is 121124567. The reversal of 121124551 is 155421121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121124551 - 2⁵ = 121124519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121124501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60562275 + 60562276.

It is an arithmetic number, because the mean of its divisors is an integer number (60562276).

Almost surely, 2^121124551 is an apocalyptic number.

121124551 is a deficient number, since it is larger than the sum of its proper divisors (1).

121124551 is an equidigital number, since it uses as much as digits as its factorization.

121124551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 22.

The square root of 121124551 is about 11005.6599529515. The cubic root of 121124551 is about 494.7783941554.

Adding to 121124551 its reverse (155421121), we get a palindrome (276545672).

The spelling of 121124551 in words is "one hundred twenty-one million, one hundred twenty-four thousand, five hundred fifty-one".