21103330103111 has 4 divisors (see below), whose sum is σ = 21594105221832. Its totient is φ = 20612554984392.

The previous prime is 21103330103099. The next prime is 21103330103123. The reversal of 21103330103111 is 11130103330112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21103330103099) and next prime (21103330103123).

It is a cyclic number.

It is not a de Polignac number, because 21103330103111 - 2⁴² = 16705283592007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103330103311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245387559296 + ... + 245387559381.

It is an arithmetic number, because the mean of its divisors is an integer number (5398526305458).

Almost surely, 2^{21103330103111} is an apocalyptic number.

21103330103111 is a deficient number, since it is larger than the sum of its proper divisors (490775118721).

21103330103111 is an equidigital number, since it uses as much as digits as its factorization.

21103330103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490775118720.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 21103330103111 its reverse (11130103330112), we get a palindrome (32233433433223).

The spelling of 21103330103111 in words is "twenty-one trillion, one hundred three billion, three hundred thirty million, one hundred three thousand, one hundred eleven".