21001112100110 has 32 divisors (see below), whose sum is σ = 38371310370720. Its totient is φ = 8273965151232.

The previous prime is 21001112100109. The next prime is 21001112100119. The reversal of 21001112100110 is 1100121110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001112100091 and 21001112100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001112100119) 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, 2970386 + ... + 7129194.

It is an arithmetic number, because the mean of its divisors is an integer number (1199103449085).

Almost surely, 2^{21001112100110} is an apocalyptic number.

21001112100110 is a deficient number, since it is larger than the sum of its proper divisors (17370198270610).

21001112100110 is a wasteful number, since it uses less digits than its factorization.

21001112100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166420.

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

Adding to 21001112100110 its reverse (1100121110012), we get a palindrome (22101233210122).

The spelling of 21001112100110 in words is "twenty-one trillion, one billion, one hundred twelve million, one hundred thousand, one hundred ten".