21010110002111 has 16 divisors (see below), whose sum is σ = 22188864921600. Its totient is φ = 19838661717600.

The previous prime is 21010110002083. The next prime is 21010110002117. The reversal of 21010110002111 is 11120001101012.

It is not a de Polignac number, because 21010110002111 - 2³⁰ = 21009036260287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010110002092 and 21010110002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110002117) 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, 73963010 + ... + 74246528.

It is an arithmetic number, because the mean of its divisors is an integer number (1386804057600).

Almost surely, 2^{21010110002111} is an apocalyptic number.

21010110002111 is a deficient number, since it is larger than the sum of its proper divisors (1178754919489).

21010110002111 is a wasteful number, since it uses less digits than its factorization.

21010110002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296390.

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

Adding to 21010110002111 its reverse (11120001101012), we get a palindrome (32130111103123).

The spelling of 21010110002111 in words is "twenty-one trillion, ten billion, one hundred ten million, two thousand, one hundred eleven".