21003320112011 has 4 divisors (see below), whose sum is σ = 21916507942992. Its totient is φ = 20090132281032.

The previous prime is 21003320111971. The next prime is 21003320112023. The reversal of 21003320112011 is 11021102330012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21003320112011 - 2¹⁸ = 21003319849867 is a prime.

It is a super-2 number, since 2×21003320112011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003320112041) 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, 456593915456 + ... + 456593915501.

It is an arithmetic number, because the mean of its divisors is an integer number (5479126985748).

Almost surely, 2^{21003320112011} is an apocalyptic number.

21003320112011 is a deficient number, since it is larger than the sum of its proper divisors (913187830981).

21003320112011 is an equidigital number, since it uses as much as digits as its factorization.

21003320112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913187830980.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21003320112011 its reverse (11021102330012), we get a palindrome (32024422442023).

The spelling of 21003320112011 in words is "twenty-one trillion, three billion, three hundred twenty million, one hundred twelve thousand, eleven".