121287329 has 2 divisors, whose sum is σ = 121287330. Its totient is φ = 121287328.

The previous prime is 121287323. The next prime is 121287377. The reversal of 121287329 is 923782121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78411025 + 42876304 = 8855^2 + 6548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121287329 is a prime.

It is not a weakly prime, because it can be changed into another prime (121287323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60643664 + 60643665.

It is an arithmetic number, because the mean of its divisors is an integer number (60643665).

Almost surely, 2^121287329 is an apocalyptic number.

It is an amenable number.

121287329 is a deficient number, since it is larger than the sum of its proper divisors (1).

121287329 is an equidigital number, since it uses as much as digits as its factorization.

121287329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 121287329 is about 11013.0526649063. The cubic root of 121287329 is about 494.9999374213. Note that the first 4 decimals are identical.

The spelling of 121287329 in words is "one hundred twenty-one million, two hundred eighty-seven thousand, three hundred twenty-nine".