21004402301 has 4 divisors (see below), whose sum is σ = 21050364252. Its totient is φ = 20958440352.

The previous prime is 21004402273. The next prime is 21004402333. The reversal of 21004402301 is 10320440012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19016134201 + 1988268100 = 137899^2 + 44590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21004402301 - 2²⁶ = 20937293437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21004402301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004402361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22980290 + ... + 22981203.

It is an arithmetic number, because the mean of its divisors is an integer number (5262591063).

Almost surely, 2^21004402301 is an apocalyptic number.

It is an amenable number.

21004402301 is a deficient number, since it is larger than the sum of its proper divisors (45961951).

21004402301 is an equidigital number, since it uses as much as digits as its factorization.

21004402301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45961950.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21004402301 its reverse (10320440012), we get a palindrome (31324842313).

The spelling of 21004402301 in words is "twenty-one billion, four million, four hundred two thousand, three hundred one".