21112201332 has 72 divisors (see below), whose sum is σ = 58033442376. Its totient is φ = 6444417024.

The previous prime is 21112201307. The next prime is 21112201333. The reversal of 21112201332 is 23310221112.

21112201332 is a `hidden beast` number, since 2 + 111 + 220 + 1 + 332 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8912115216 + 12200086116 = 94404^2 + 110454^2 .

It is a super-3 number, since 3×21112201332³ (a number of 32 digits) contains 333 as substring.

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 (21112201333) 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, 443533 + ... + 488820.

It is an arithmetic number, because the mean of its divisors is an integer number (806020033).

Almost surely, 2^21112201332 is an apocalyptic number.

It is an amenable number.

21112201332 is an abundant number, since it is smaller than the sum of its proper divisors (36921241044).

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

21112201332 is a wasteful number, since it uses less digits than its factorization.

21112201332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932417 (or 932412 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21112201332 its reverse (23310221112), we get a palindrome (44422422444).

The spelling of 21112201332 in words is "twenty-one billion, one hundred twelve million, two hundred one thousand, three hundred thirty-two".