21101230332 has 72 divisors (see below), whose sum is σ = 65648282336. Its totient is φ = 5565158784.

The previous prime is 21101230303. The next prime is 21101230333. The reversal of 21101230332 is 23303210112.

21101230332 is a `hidden beast` number, since 2 + 1 + 101 + 230 + 332 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101230333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3217303 + ... + 3223854.

Almost surely, 2^21101230332 is an apocalyptic number.

It is an amenable number.

21101230332 is an abundant number, since it is smaller than the sum of its proper divisors (44547052004).

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

21101230332 is a wasteful number, since it uses less digits than its factorization.

21101230332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6441187 (or 6441182 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21101230332 its reverse (23303210112), we get a palindrome (44404440444).

The spelling of 21101230332 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, three hundred thirty-two".