102412421 has 2 divisors, whose sum is σ = 102412422. Its totient is φ = 102412420.

The previous prime is 102412397. The next prime is 102412423. The reversal of 102412421 is 124214201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82609921 + 19802500 = 9089^2 + 4450^2 .

It is a cyclic number.

It is not a de Polignac number, because 102412421 - 2²⁶ = 35303557 is a prime.

Together with 102412423, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102412421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102412423) 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 as a sum of consecutive naturals, namely, 51206210 + 51206211.

It is an arithmetic number, because the mean of its divisors is an integer number (51206211).

Almost surely, 2^102412421 is an apocalyptic number.

It is an amenable number.

102412421 is a deficient number, since it is larger than the sum of its proper divisors (1).

102412421 is an equidigital number, since it uses as much as digits as its factorization.

102412421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 102412421 is about 10119.9022228478. The cubic root of 102412421 is about 467.8617536119.

Adding to 102412421 its reverse (124214201), we get a palindrome (226626622).

The spelling of 102412421 in words is "one hundred two million, four hundred twelve thousand, four hundred twenty-one".