12121451 has 2 divisors, whose sum is σ = 12121452. Its totient is φ = 12121450.

The previous prime is 12121427. The next prime is 12121457. The reversal of 12121451 is 15412121.

It is a strong prime.

It is an emirp because it is prime and its reverse (15412121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12121451 - 2⁶ = 12121387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12121457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060725 + 6060726.

It is an arithmetic number, because the mean of its divisors is an integer number (6060726).

Almost surely, 2^12121451 is an apocalyptic number.

12121451 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121451 is an equidigital number, since it uses as much as digits as its factorization.

12121451 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12121451 is about 3481.5874252990. The cubic root of 12121451 is about 229.7126278616.

Adding to 12121451 its reverse (15412121), we get a palindrome (27533572).

The spelling of 12121451 in words is "twelve million, one hundred twenty-one thousand, four hundred fifty-one".