421101029 has 2 divisors, whose sum is σ = 421101030. Its totient is φ = 421101028.

The previous prime is 421101019. The next prime is 421101041. The reversal of 421101029 is 920101124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348680929 + 72420100 = 18673^2 + 8510^2 .

It is a cyclic number.

It is not a de Polignac number, because 421101029 - 2⁴ = 421101013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421101029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421101019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210550514 + 210550515.

It is an arithmetic number, because the mean of its divisors is an integer number (210550515).

Almost surely, 2^421101029 is an apocalyptic number.

It is an amenable number.

421101029 is a deficient number, since it is larger than the sum of its proper divisors (1).

421101029 is an equidigital number, since it uses as much as digits as its factorization.

421101029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 421101029 is about 20520.7463070913. The cubic root of 421101029 is about 749.5410697532.

The spelling of 421101029 in words is "four hundred twenty-one million, one hundred one thousand, twenty-nine".