21121222332 has 48 divisors (see below), whose sum is σ = 56345006592. Its totient is φ = 6032304960.

The previous prime is 21121222327. The next prime is 21121222357. The reversal of 21121222332 is 23322212112.

It is a super-2 number, since 2×21121222332² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21121222299 and 21121222308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176482 + ... + 270902.

It is an arithmetic number, because the mean of its divisors is an integer number (1173854304).

Almost surely, 2^21121222332 is an apocalyptic number.

It is an amenable number.

21121222332 is an abundant number, since it is smaller than the sum of its proper divisors (35223784260).

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

21121222332 is a wasteful number, since it uses less digits than its factorization.

21121222332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97098 (or 97096 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 21121222332 its reverse (23322212112), we get a palindrome (44443434444).

The spelling of 21121222332 in words is "twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred thirty-two".