21100220233 has 8 divisors (see below), whose sum is σ = 22213368320. Its totient is φ = 19987333200.

The previous prime is 21100220231. The next prime is 21100220257. The reversal of 21100220233 is 33202200112.

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 21100220233 - 2¹ = 21100220231 is a prime.

It is a super-2 number, since 2×21100220233² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100220231) 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, 113191 + ... + 234547.

It is an arithmetic number, because the mean of its divisors is an integer number (2776671040).

Almost surely, 2^21100220233 is an apocalyptic number.

It is an amenable number.

21100220233 is a deficient number, since it is larger than the sum of its proper divisors (1113148087).

21100220233 is a wasteful number, since it uses less digits than its factorization.

21100220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130527.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21100220233 its reverse (33202200112), we get a palindrome (54302420345).

The spelling of 21100220233 in words is "twenty-one billion, one hundred million, two hundred twenty thousand, two hundred thirty-three".