21221110110011 has 16 divisors (see below), whose sum is σ = 24346982246400. Its totient is φ = 18118820979168.

The previous prime is 21221110109977. The next prime is 21221110110017. The reversal of 21221110110011 is 11001101112212.

It is a de Polignac number, because none of the positive numbers 2^k-21221110110011 is a prime.

It is a super-2 number, since 2×21221110110011² (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 (21221110110017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21440510 + ... + 22408428.

It is an arithmetic number, because the mean of its divisors is an integer number (1521686390400).

Almost surely, 2^{21221110110011} is an apocalyptic number.

21221110110011 is a deficient number, since it is larger than the sum of its proper divisors (3125872136389).

21221110110011 is a wasteful number, since it uses less digits than its factorization.

21221110110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980098.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21221110110011 its reverse (11001101112212), we get a palindrome (32222211222223).

The spelling of 21221110110011 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred ten thousand, eleven".