21120310220103 has 24 divisors (see below), whose sum is σ = 30621279733200. Its totient is φ = 14027517874944.

The previous prime is 21120310220081. The next prime is 21120310220129. The reversal of 21120310220103 is 30102201302112.

21120310220103 is a `hidden beast` number, since 2 + 1 + 120 + 310 + 220 + 10 + 3 = 666.

It is not a de Polignac number, because 21120310220103 - 2⁵ = 21120310220071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120310420103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130989951 + ... + 131151087.

It is an arithmetic number, because the mean of its divisors is an integer number (1275886655550).

Almost surely, 2^{21120310220103} is an apocalyptic number.

21120310220103 is a deficient number, since it is larger than the sum of its proper divisors (9500969513097).

21120310220103 is a wasteful number, since it uses less digits than its factorization.

21120310220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215551 (or 215548 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21120310220103 its reverse (30102201302112), we get a palindrome (51222511522215).

The spelling of 21120310220103 in words is "twenty-one trillion, one hundred twenty billion, three hundred ten million, two hundred twenty thousand, one hundred three".