21211012032 has 224 divisors, whose sum is σ = 66573196800. Its totient is φ = 5831626752.

The previous prime is 21211011973. The next prime is 21211012033. The reversal of 21211012032 is 23021011212.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211012033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14537319 + ... + 14538777.

Almost surely, 2^21211012032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21211012032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33286598400).

21211012032 is an abundant number, since it is smaller than the sum of its proper divisors (45362184768).

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

21211012032 is a wasteful number, since it uses less digits than its factorization.

21211012032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1873 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21211012032 its reverse (23021011212), we get a palindrome (44232023244).

The spelling of 21211012032 in words is "twenty-one billion, two hundred eleven million, twelve thousand, thirty-two".