21100323113111 has 16 divisors (see below), whose sum is σ = 23558174534400. Its totient is φ = 18732575574720.

The previous prime is 21100323113101. The next prime is 21100323113119. The reversal of 21100323113111 is 11131132300112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100323113111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100323113119) 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, 1515995 + ... + 6670748.

It is an arithmetic number, because the mean of its divisors is an integer number (1472385908400).

Almost surely, 2^{21100323113111} is an apocalyptic number.

21100323113111 is a deficient number, since it is larger than the sum of its proper divisors (2457851421289).

21100323113111 is a wasteful number, since it uses less digits than its factorization.

21100323113111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192246.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 21100323113111 its reverse (11131132300112), we get a palindrome (32231455413223).

The spelling of 21100323113111 in words is "twenty-one trillion, one hundred billion, three hundred twenty-three million, one hundred thirteen thousand, one hundred eleven".