13121851 has 2 divisors, whose sum is σ = 13121852. Its totient is φ = 13121850.

The previous prime is 13121839. The next prime is 13121863. The reversal of 13121851 is 15812131.

13121851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (13121839) and next prime (13121863).

It is a cyclic number.

It is not a de Polignac number, because 13121851 - 2²³ = 4733243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13121881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560925 + 6560926.

It is an arithmetic number, because the mean of its divisors is an integer number (6560926).

Almost surely, 2^13121851 is an apocalyptic number.

13121851 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121851 is an equidigital number, since it uses as much as digits as its factorization.

13121851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 22.

The square root of 13121851 is about 3622.4095571870. The cubic root of 13121851 is about 235.8658327217.

Adding to 13121851 its reverse (15812131), we get a palindrome (28933982).

The spelling of 13121851 in words is "thirteen million, one hundred twenty-one thousand, eight hundred fifty-one".