21201002233 has 4 divisors (see below), whose sum is σ = 21227144848. Its totient is φ = 21174859620.

The previous prime is 21201002227. The next prime is 21201002279. The reversal of 21201002233 is 33220010212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21201002233 - 2¹³ = 21200994041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201002293) 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, 13070091 + ... + 13071712.

It is an arithmetic number, because the mean of its divisors is an integer number (5306786212).

Almost surely, 2^21201002233 is an apocalyptic number.

It is an amenable number.

21201002233 is a deficient number, since it is larger than the sum of its proper divisors (26142615).

21201002233 is an equidigital number, since it uses as much as digits as its factorization.

21201002233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26142614.

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

Adding to 21201002233 its reverse (33220010212), we get a palindrome (54421012445).

The spelling of 21201002233 in words is "twenty-one billion, two hundred one million, two thousand, two hundred thirty-three".