21113302213 has 4 divisors (see below), whose sum is σ = 21127854528. Its totient is φ = 21098749900.

The previous prime is 21113302207. The next prime is 21113302219. The reversal of 21113302213 is 31220331112.

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 an interprime number because it is at equal distance from previous prime (21113302207) and next prime (21113302219).

It is a cyclic number.

It is not a de Polignac number, because 21113302213 - 2⁵ = 21113302181 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 (21113302219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7273981 + ... + 7276882.

It is an arithmetic number, because the mean of its divisors is an integer number (5281963632).

Almost surely, 2^21113302213 is an apocalyptic number.

It is an amenable number.

21113302213 is a deficient number, since it is larger than the sum of its proper divisors (14552315).

21113302213 is a wasteful number, since it uses less digits than its factorization.

21113302213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14552314.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21113302213 its reverse (31220331112), we get a palindrome (52333633325).

The spelling of 21113302213 in words is "twenty-one billion, one hundred thirteen million, three hundred two thousand, two hundred thirteen".