21000112111101 has 16 divisors (see below), whose sum is σ = 29532437706240. Its totient is φ = 13236860435760.

The previous prime is 21000112111091. The next prime is 21000112111141. The reversal of 21000112111101 is 10111121100012.

It is not a de Polignac number, because 21000112111101 - 2¹⁰ = 21000112110077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000112111141) 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, 366196995 + ... + 366254336.

It is an arithmetic number, because the mean of its divisors is an integer number (1845777356640).

Almost surely, 2^{21000112111101} is an apocalyptic number.

It is an amenable number.

21000112111101 is a deficient number, since it is larger than the sum of its proper divisors (8532325595139).

21000112111101 is a wasteful number, since it uses less digits than its factorization.

21000112111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732451856.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21000112111101 its reverse (10111121100012), we get a palindrome (31111233211113).

The spelling of 21000112111101 in words is "twenty-one trillion, one hundred twelve million, one hundred eleven thousand, one hundred one".