21101110107 has 32 divisors (see below), whose sum is σ = 37140539904. Its totient is φ = 10316812800.

The previous prime is 21101110099. The next prime is 21101110207. The reversal of 21101110107 is 70101110112.

It is not a de Polignac number, because 21101110107 - 2³ = 21101110099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101110207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2682744 + ... + 2690597.

It is an arithmetic number, because the mean of its divisors is an integer number (1160641872).

Almost surely, 2^21101110107 is an apocalyptic number.

21101110107 is a deficient number, since it is larger than the sum of its proper divisors (16039429797).

21101110107 is a wasteful number, since it uses less digits than its factorization.

21101110107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373379.

The product of its (nonzero) digits is 14, while the sum is 15.

Adding to 21101110107 its reverse (70101110112), we get a palindrome (91202220219).

The spelling of 21101110107 in words is "twenty-one billion, one hundred one million, one hundred ten thousand, one hundred seven".