21012010110011 has 16 divisors (see below), whose sum is σ = 22681960277760. Its totient is φ = 19405112163360.

The previous prime is 21012010109989. The next prime is 21012010110023. The reversal of 21012010110011 is 11001101021012.

It is a cyclic number.

It is not a de Polignac number, because 21012010110011 - 2⁶ = 21012010109947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012010109974 and 21012010110001.

It is not an unprimeable number, because it can be changed into a prime (21012010110061) 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, 55928156 + ... + 56302598.

It is an arithmetic number, because the mean of its divisors is an integer number (1417622517360).

Almost surely, 2^{21012010110011} is an apocalyptic number.

21012010110011 is a deficient number, since it is larger than the sum of its proper divisors (1669950167749).

21012010110011 is a wasteful number, since it uses less digits than its factorization.

21012010110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458626.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21012010110011 its reverse (11001101021012), we get a palindrome (32013111131023).

The spelling of 21012010110011 in words is "twenty-one trillion, twelve billion, ten million, one hundred ten thousand, eleven".