21200212032 has 56 divisors (see below), whose sum is σ = 59391779616. Its totient is φ = 6651045888.

The previous prime is 21200212021. The next prime is 21200212043. The reversal of 21200212032 is 23021200212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21200212021) and next prime (21200212043).

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, 3244318 + ... + 3250845.

Almost surely, 2^21200212032 is an apocalyptic number.

It is an amenable number.

21200212032 is an abundant number, since it is smaller than the sum of its proper divisors (38191567584).

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

21200212032 is a wasteful number, since it uses less digits than its factorization.

21200212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495195 (or 6495185 counting only the distinct ones).

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

Adding to 21200212032 its reverse (23021200212), we get a palindrome (44221412244).

The spelling of 21200212032 in words is "twenty-one billion, two hundred million, two hundred twelve thousand, thirty-two".