21260242112 has 14 divisors (see below), whose sum is σ = 42188293068. Its totient is φ = 10630121024.

The previous prime is 21260242063. The next prime is 21260242117. The reversal of 21260242112 is 21124206212.

It is not an unprimeable number, because it can be changed into a prime (21260242117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166095578 + ... + 166095705.

Almost surely, 2^21260242112 is an apocalyptic number.

It is an amenable number.

21260242112 is a deficient number, since it is larger than the sum of its proper divisors (20928050956).

21260242112 is an equidigital number, since it uses as much as digits as its factorization.

21260242112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332191295 (or 332191285 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21260242112 its reverse (21124206212), we get a palindrome (42384448324).

The spelling of 21260242112 in words is "twenty-one billion, two hundred sixty million, two hundred forty-two thousand, one hundred twelve".