121551233 has 2 divisors, whose sum is σ = 121551234. Its totient is φ = 121551232.

The previous prime is 121551229. The next prime is 121551257. The reversal of 121551233 is 332155121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 50452609 = 8432^2 + 7103^2 .

It is a cyclic number.

It is not a de Polignac number, because 121551233 - 2² = 121551229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121551199 and 121551208.

It is not a weakly prime, because it can be changed into another prime (121551263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60775616 + 60775617.

It is an arithmetic number, because the mean of its divisors is an integer number (60775617).

Almost surely, 2^121551233 is an apocalyptic number.

It is an amenable number.

121551233 is a deficient number, since it is larger than the sum of its proper divisors (1).

121551233 is an equidigital number, since it uses as much as digits as its factorization.

121551233 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121551233 is about 11025.0275736617. The cubic root of 121551233 is about 495.3586938637.

The spelling of 121551233 in words is "one hundred twenty-one million, five hundred fifty-one thousand, two hundred thirty-three".