13201421 has 2 divisors, whose sum is σ = 13201422. Its totient is φ = 13201420.

The previous prime is 13201417. The next prime is 13201439. The reversal of 13201421 is 12410231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11485321 + 1716100 = 3389^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 13201421 - 2² = 13201417 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13201396 and 13201405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13201411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600710 + 6600711.

It is an arithmetic number, because the mean of its divisors is an integer number (6600711).

Almost surely, 2^13201421 is an apocalyptic number.

It is an amenable number.

13201421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13201421 is an equidigital number, since it uses as much as digits as its factorization.

13201421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 13201421 is about 3633.3759783430. The cubic root of 13201421 is about 236.3416303298.

Adding to 13201421 its reverse (12410231), we get a palindrome (25611652).

The spelling of 13201421 in words is "thirteen million, two hundred one thousand, four hundred twenty-one".