121332551 has 2 divisors, whose sum is σ = 121332552. Its totient is φ = 121332550.

The previous prime is 121332503. The next prime is 121332581. The reversal of 121332551 is 155233121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (155233121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121332551 - 2⁶ = 121332487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121332581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60666275 + 60666276.

It is an arithmetic number, because the mean of its divisors is an integer number (60666276).

Almost surely, 2^121332551 is an apocalyptic number.

121332551 is a deficient number, since it is larger than the sum of its proper divisors (1).

121332551 is an equidigital number, since it uses as much as digits as its factorization.

121332551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 121332551 is about 11015.1055827895. The cubic root of 121332551 is about 495.0614500456.

Adding to 121332551 its reverse (155233121), we get a palindrome (276565672).

The spelling of 121332551 in words is "one hundred twenty-one million, three hundred thirty-two thousand, five hundred fifty-one".