421101073 has 2 divisors, whose sum is σ = 421101074. Its totient is φ = 421101072.

The previous prime is 421101049. The next prime is 421101077. The reversal of 421101073 is 370101124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392713489 + 28387584 = 19817^2 + 5328^2 .

It is a cyclic number.

It is not a de Polignac number, because 421101073 - 2⁵ = 421101041 is a prime.

It is a super-2 number, since 2×421101073² = 354652227363502658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421101073.

It is not a weakly prime, because it can be changed into another prime (421101077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210550536 + 210550537.

It is an arithmetic number, because the mean of its divisors is an integer number (210550537).

Almost surely, 2^421101073 is an apocalyptic number.

It is an amenable number.

421101073 is a deficient number, since it is larger than the sum of its proper divisors (1).

421101073 is an equidigital number, since it uses as much as digits as its factorization.

421101073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 421101073 is about 20520.7473791770. The cubic root of 421101073 is about 749.5410958592.

Adding to 421101073 its reverse (370101124), we get a palindrome (791202197).

The spelling of 421101073 in words is "four hundred twenty-one million, one hundred one thousand, seventy-three".