21021884201 has 8 divisors (see below), whose sum is σ = 21060316224. Its totient is φ = 20983475920.

The previous prime is 21021884173. The next prime is 21021884231. The reversal of 21021884201 is 10248812012.

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 21021884201 - 2⁶ = 21021884137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021884231) 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, 3327836 + ... + 3334146.

It is an arithmetic number, because the mean of its divisors is an integer number (2632539528).

Almost surely, 2^21021884201 is an apocalyptic number.

It is an amenable number.

21021884201 is a deficient number, since it is larger than the sum of its proper divisors (38432023).

21021884201 is an equidigital number, since it uses as much as digits as its factorization.

21021884201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11871.

The product of its (nonzero) digits is 2048, while the sum is 29.

The spelling of 21021884201 in words is "twenty-one billion, twenty-one million, eight hundred eighty-four thousand, two hundred one".