21023110113 has 4 divisors (see below), whose sum is σ = 28030813488. Its totient is φ = 14015406740.

The previous prime is 21023110111. The next prime is 21023110127. The reversal of 21023110113 is 31101132012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21023110113 - 2¹ = 21023110111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21023110092 and 21023110101.

It is not an unprimeable number, because it can be changed into a prime (21023110111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503851683 + ... + 3503851688.

It is an arithmetic number, because the mean of its divisors is an integer number (7007703372).

Almost surely, 2^21023110113 is an apocalyptic number.

It is an amenable number.

21023110113 is a deficient number, since it is larger than the sum of its proper divisors (7007703375).

21023110113 is an equidigital number, since it uses as much as digits as its factorization.

21023110113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007703374.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21023110113 its reverse (31101132012), we get a palindrome (52124242125).

The spelling of 21023110113 in words is "twenty-one billion, twenty-three million, one hundred ten thousand, one hundred thirteen".