21112220020203 has 12 divisors (see below), whose sum is σ = 32841231142720. Its totient is φ = 12992135396976.

The previous prime is 21112220020169. The next prime is 21112220020267. The reversal of 21112220020203 is 30202002221112.

21112220020203 is a `hidden beast` number, since 211 + 12 + 220 + 0 + 20 + 203 = 666.

It is not a de Polignac number, because 21112220020203 - 2⁹ = 21112220019691 is a prime.

It is a super-2 number, since 2×21112220020203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112220020103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90223162363 + ... + 90223162596.

Almost surely, 2^{21112220020203} is an apocalyptic number.

21112220020203 is a deficient number, since it is larger than the sum of its proper divisors (11729011122517).

21112220020203 is a wasteful number, since it uses less digits than its factorization.

21112220020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180446324978 (or 180446324975 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21112220020203 its reverse (30202002221112), we get a palindrome (51314222241315).

The spelling of 21112220020203 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, twenty thousand, two hundred three".