21230120011103 has 4 divisors (see below), whose sum is σ = 21234732251208. Its totient is φ = 21225507771000.

The previous prime is 21230120011069. The next prime is 21230120011207. The reversal of 21230120011103 is 30111002103212.

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

It is a cyclic number.

It is not a de Polignac number, because 21230120011103 - 2⁶ = 21230120011039 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 (21230120031103) 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, 2306113148 + ... + 2306122353.

It is an arithmetic number, because the mean of its divisors is an integer number (5308683062802).

Almost surely, 2^{21230120011103} is an apocalyptic number.

21230120011103 is a deficient number, since it is larger than the sum of its proper divisors (4612240105).

21230120011103 is an equidigital number, since it uses as much as digits as its factorization.

21230120011103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612240104.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21230120011103 its reverse (30111002103212), we get a palindrome (51341122114315).

The spelling of 21230120011103 in words is "twenty-one trillion, two hundred thirty billion, one hundred twenty million, eleven thousand, one hundred three".