21126225232 has 20 divisors (see below), whose sum is σ = 46779498976. Its totient is φ = 9054096480.

The previous prime is 21126225203. The next prime is 21126225277. The reversal of 21126225232 is 23252262112.

It is a super-3 number, since 3×21126225232³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 21126225232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94313394 + ... + 94313617.

Almost surely, 2^21126225232 is an apocalyptic number.

It is an amenable number.

21126225232 is an abundant number, since it is smaller than the sum of its proper divisors (25653273744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21126225232 is a wasteful number, since it uses less digits than its factorization.

21126225232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188627026 (or 188627020 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

Adding to 21126225232 its reverse (23252262112), we get a palindrome (44378487344).

The spelling of 21126225232 in words is "twenty-one billion, one hundred twenty-six million, two hundred twenty-five thousand, two hundred thirty-two".