21104020201 has 8 divisors (see below), whose sum is σ = 24376836384. Its totient is φ = 18056915520.

The previous prime is 21104020187. The next prime is 21104020207. The reversal of 21104020201 is 10202040112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21104020201 - 2⁷ = 21104020073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21104020207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56427675 + ... + 56428048.

It is an arithmetic number, because the mean of its divisors is an integer number (3047104548).

Almost surely, 2^21104020201 is an apocalyptic number.

It is an amenable number.

21104020201 is a deficient number, since it is larger than the sum of its proper divisors (3272816183).

21104020201 is a wasteful number, since it uses less digits than its factorization.

21104020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112855751.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21104020201 its reverse (10202040112), we get a palindrome (31306060313).

The spelling of 21104020201 in words is "twenty-one billion, one hundred four million, twenty thousand, two hundred one".