13102421 has 4 divisors (see below), whose sum is σ = 13189344. Its totient is φ = 13015500.

The previous prime is 13102417. The next prime is 13102459. The reversal of 13102421 is 12420131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13102421 - 2² = 13102417 is a prime.

It is a super-2 number, since 2×13102421² = 343346872122482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13102396 and 13102405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13102021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43235 + ... + 43536.

It is an arithmetic number, because the mean of its divisors is an integer number (3297336).

Almost surely, 2^13102421 is an apocalyptic number.

It is an amenable number.

13102421 is a deficient number, since it is larger than the sum of its proper divisors (86923).

13102421 is an equidigital number, since it uses as much as digits as its factorization.

13102421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86922.

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

The square root of 13102421 is about 3619.7266471379. The cubic root of 13102421 is about 235.7493568525.

Adding to 13102421 its reverse (12420131), we get a palindrome (25522552).

The spelling of 13102421 in words is "thirteen million, one hundred two thousand, four hundred twenty-one".