121276553 has 2 divisors, whose sum is σ = 121276554. Its totient is φ = 121276552.

The previous prime is 121276541. The next prime is 121276583. The reversal of 121276553 is 355672121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121176064 + 100489 = 11008^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 121276553 - 2⁶ = 121276489 is a prime.

It is not a weakly prime, because it can be changed into another prime (121276513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60638276 + 60638277.

It is an arithmetic number, because the mean of its divisors is an integer number (60638277).

Almost surely, 2^121276553 is an apocalyptic number.

It is an amenable number.

121276553 is a deficient number, since it is larger than the sum of its proper divisors (1).

121276553 is an equidigital number, since it uses as much as digits as its factorization.

121276553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 121276553 is about 11012.5634163895. The cubic root of 121276553 is about 494.9852772549.

The spelling of 121276553 in words is "one hundred twenty-one million, two hundred seventy-six thousand, five hundred fifty-three".