21200021101 has 8 divisors (see below), whose sum is σ = 24297234624. Its totient is φ = 18119967360.

The previous prime is 21200021047. The next prime is 21200021107. The reversal of 21200021101 is 10112000212.

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 21200021101 - 2¹¹ = 21200019053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200021107) 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, 4287295 + ... + 4292236.

It is an arithmetic number, because the mean of its divisors is an integer number (3037154328).

Almost surely, 2^21200021101 is an apocalyptic number.

It is an amenable number.

21200021101 is a deficient number, since it is larger than the sum of its proper divisors (3097213523).

21200021101 is an equidigital number, since it uses as much as digits as its factorization.

21200021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8579891.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21200021101 its reverse (10112000212), we get a palindrome (31312021313).

The spelling of 21200021101 in words is "twenty-one billion, two hundred million, twenty-one thousand, one hundred one".