102401321 has 4 divisors (see below), whose sum is σ = 111710544. Its totient is φ = 93092100.

The previous prime is 102401309. The next prime is 102401323. The reversal of 102401321 is 123104201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123104201 = 11 ⋅11191291.

It is a cyclic number.

It is not a de Polignac number, because 102401321 - 2²⁶ = 35292457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102401296 and 102401305.

It is not an unprimeable number, because it can be changed into a prime (102401323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4654595 + ... + 4654616.

It is an arithmetic number, because the mean of its divisors is an integer number (27927636).

Almost surely, 2^102401321 is an apocalyptic number.

102401321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102401321 is a deficient number, since it is larger than the sum of its proper divisors (9309223).

102401321 is an equidigital number, since it uses as much as digits as its factorization.

102401321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9309222.

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

The square root of 102401321 is about 10119.3537837156. The cubic root of 102401321 is about 467.8448498905.

Adding to 102401321 its reverse (123104201), we get a palindrome (225505522).

The spelling of 102401321 in words is "one hundred two million, four hundred one thousand, three hundred twenty-one".