21011100002211 has 16 divisors (see below), whose sum is σ = 30562733755008. Its totient is φ = 12733527604800.

The previous prime is 21011100002153. The next prime is 21011100002297. The reversal of 21011100002211 is 11220000111012.

It is not a de Polignac number, because 21011100002211 - 2²² = 21011095807907 is a prime.

It is a super-2 number, since 2×21011100002211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011100002411) 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, 10905850 + ... + 12686991.

It is an arithmetic number, because the mean of its divisors is an integer number (1910170859688).

Almost surely, 2^{21011100002211} is an apocalyptic number.

21011100002211 is a deficient number, since it is larger than the sum of its proper divisors (9551633752797).

21011100002211 is a wasteful number, since it uses less digits than its factorization.

21011100002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23619842.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011100002211 its reverse (11220000111012), we get a palindrome (32231100113223).

The spelling of 21011100002211 in words is "twenty-one trillion, eleven billion, one hundred million, two thousand, two hundred eleven".