21122200203 has 16 divisors (see below), whose sum is σ = 30357958176. Its totient is φ = 12986000640.

The previous prime is 21122200189. The next prime is 21122200219. The reversal of 21122200203 is 30200222112.

It is a happy number.

It is not a de Polignac number, because 21122200203 - 2²⁰ = 21121151627 is a prime.

It is a super-2 number, since 2×21122200203² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122200223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213850 + ... + 296607.

It is an arithmetic number, because the mean of its divisors is an integer number (1897372386).

Almost surely, 2^21122200203 is an apocalyptic number.

21122200203 is a deficient number, since it is larger than the sum of its proper divisors (9235757973).

21122200203 is a wasteful number, since it uses less digits than its factorization.

21122200203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511534.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21122200203 its reverse (30200222112), we get a palindrome (51322422315).

The spelling of 21122200203 in words is "twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred three".