21102212032 has 112 divisors (see below), whose sum is σ = 47139148800. Its totient is φ = 9290511360.

The previous prime is 21102211997. The next prime is 21102212051. The reversal of 21102212032 is 23021220112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 21102211997 and 21102212015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2944069 + ... + 2951227.

Almost surely, 2^21102212032 is an apocalyptic number.

21102212032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21102212032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23569574400).

21102212032 is an abundant number, since it is smaller than the sum of its proper divisors (26036936768).

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

21102212032 is a wasteful number, since it uses less digits than its factorization.

21102212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314 (or 7304 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21102212032 its reverse (23021220112), we get a palindrome (44123432144).

The spelling of 21102212032 in words is "twenty-one billion, one hundred two million, two hundred twelve thousand, thirty-two".