21220120011203 has 4 divisors (see below), whose sum is σ = 21220131389880. Its totient is φ = 21220108632528.

The previous prime is 21220120011197. The next prime is 21220120011229. The reversal of 21220120011203 is 30211002102212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21220120011203 - 2²² = 21220115816899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220120011703) 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, 2163725 + ... + 6864542.

It is an arithmetic number, because the mean of its divisors is an integer number (5305032847470).

Almost surely, 2^{21220120011203} is an apocalyptic number.

21220120011203 is a deficient number, since it is larger than the sum of its proper divisors (11378677).

21220120011203 is an equidigital number, since it uses as much as digits as its factorization.

21220120011203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11378676.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21220120011203 its reverse (30211002102212), we get a palindrome (51431122113415).

The spelling of 21220120011203 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty million, eleven thousand, two hundred three".