21260203112 has 32 divisors (see below), whose sum is σ = 39966366600. Its totient is φ = 10602547200.

The previous prime is 21260203103. The next prime is 21260203127. The reversal of 21260203112 is 21130206212.

It can be written as a sum of positive squares in 4 ways, for example, as 5801259556 + 15458943556 = 76166^2 + 124334^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6141062 + ... + 6144522.

Almost surely, 2^21260203112 is an apocalyptic number.

It is an amenable number.

21260203112 is a deficient number, since it is larger than the sum of its proper divisors (18706163488).

21260203112 is a wasteful number, since it uses less digits than its factorization.

21260203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5233 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21260203112 its reverse (21130206212), we get a palindrome (42390409324).

The spelling of 21260203112 in words is "twenty-one billion, two hundred sixty million, two hundred three thousand, one hundred twelve".