104211421 has 2 divisors, whose sum is σ = 104211422. Its totient is φ = 104211420.

The previous prime is 104211391. The next prime is 104211427. The reversal of 104211421 is 124112401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 16695396 = 9355^2 + 4086^2 .

It is a cyclic number.

It is not a de Polignac number, because 104211421 - 2²¹ = 102114269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 104211395 and 104211404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104211427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52105710 + 52105711.

It is an arithmetic number, because the mean of its divisors is an integer number (52105711).

Almost surely, 2^104211421 is an apocalyptic number.

It is an amenable number.

104211421 is a deficient number, since it is larger than the sum of its proper divisors (1).

104211421 is an equidigital number, since it uses as much as digits as its factorization.

104211421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 104211421 is about 10208.3995317581. The cubic root of 104211421 is about 470.5853894966.

Adding to 104211421 its reverse (124112401), we get a palindrome (228323822).

The spelling of 104211421 in words is "one hundred four million, two hundred eleven thousand, four hundred twenty-one".