21011101010011 has 64 divisors (see below), whose sum is σ = 25121559214080. Its totient is φ = 17205180088320.

The previous prime is 21011101009993. The next prime is 21011101010041. The reversal of 21011101010011 is 11001010111012.

It is not a de Polignac number, because 21011101010011 - 2²³ = 21011092621403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21011101010011.

It is not an unprimeable number, because it can be changed into a prime (21011101010041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 482116420 + ... + 482159998.

It is an arithmetic number, because the mean of its divisors is an integer number (392524362720).

Almost surely, 2^{21011101010011} is an apocalyptic number.

21011101010011 is a deficient number, since it is larger than the sum of its proper divisors (4110458204069).

21011101010011 is a wasteful number, since it uses less digits than its factorization.

21011101010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43964.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21011101010011 its reverse (11001010111012), we get a palindrome (32012111121023).

The spelling of 21011101010011 in words is "twenty-one trillion, eleven billion, one hundred one million, ten thousand, eleven".