21221333002113 has 4 divisors (see below), whose sum is σ = 28295110669488. Its totient is φ = 14147555334740.

The previous prime is 21221333002097. The next prime is 21221333002123. The reversal of 21221333002113 is 31120033312212.

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 21221333002113 - 2⁴ = 21221333002097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221333002123) 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, 3536888833683 + ... + 3536888833688.

It is an arithmetic number, because the mean of its divisors is an integer number (7073777667372).

Almost surely, 2^{21221333002113} is an apocalyptic number.

It is an amenable number.

21221333002113 is a deficient number, since it is larger than the sum of its proper divisors (7073777667375).

21221333002113 is an equidigital number, since it uses as much as digits as its factorization.

21221333002113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073777667374.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21221333002113 its reverse (31120033312212), we get a palindrome (52341366314325).

The spelling of 21221333002113 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred thirty-three million, two thousand, one hundred thirteen".