21010110011011 has 32 divisors (see below), whose sum is σ = 24139907338752. Its totient is φ = 18099861288960.

The previous prime is 21010110010979. The next prime is 21010110011017. The reversal of 21010110011011 is 11011001101012.

It is not a de Polignac number, because 21010110011011 - 2⁵ = 21010110010979 is a prime.

It is a super-5 number, since 5×21010110011011⁵ (a number of 68 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010110011017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11538531 + ... + 13234723.

It is an arithmetic number, because the mean of its divisors is an integer number (754372104336).

Almost surely, 2^{21010110011011} is an apocalyptic number.

21010110011011 is a deficient number, since it is larger than the sum of its proper divisors (3129797327741).

21010110011011 is a wasteful number, since it uses less digits than its factorization.

21010110011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696683.

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

Adding to 21010110011011 its reverse (11011001101012), we get a palindrome (32021111112023).

The spelling of 21010110011011 in words is "twenty-one trillion, ten billion, one hundred ten million, eleven thousand, eleven".