121512401 has 2 divisors, whose sum is σ = 121512402. Its totient is φ = 121512400.

The previous prime is 121512383. The next prime is 121512431. The reversal of 121512401 is 104215121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76300225 + 45212176 = 8735^2 + 6724^2 .

It is a cyclic number.

It is not a de Polignac number, because 121512401 - 2⁶ = 121512337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121512401.

It is not a weakly prime, because it can be changed into another prime (121512431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60756200 + 60756201.

It is an arithmetic number, because the mean of its divisors is an integer number (60756201).

Almost surely, 2^121512401 is an apocalyptic number.

It is an amenable number.

121512401 is a deficient number, since it is larger than the sum of its proper divisors (1).

121512401 is an equidigital number, since it uses as much as digits as its factorization.

121512401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 121512401 is about 11023.2663489548. The cubic root of 121512401 is about 495.3059374604.

Adding to 121512401 its reverse (104215121), we get a palindrome (225727522).

The spelling of 121512401 in words is "one hundred twenty-one million, five hundred twelve thousand, four hundred one".