21212211332 has 48 divisors (see below), whose sum is σ = 40157483520. Its totient is φ = 9746137728.

The previous prime is 21212211331. The next prime is 21212211341. The reversal of 21212211332 is 23311221212.

It is not an unprimeable number, because it can be changed into a prime (21212211331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14905973 + ... + 14907395.

It is an arithmetic number, because the mean of its divisors is an integer number (836614240).

Almost surely, 2^21212211332 is an apocalyptic number.

It is an amenable number.

21212211332 is a deficient number, since it is larger than the sum of its proper divisors (18945272188).

21212211332 is a wasteful number, since it uses less digits than its factorization.

21212211332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532 (or 2530 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 21212211332 its reverse (23311221212), we get a palindrome (44523432544).

The spelling of 21212211332 in words is "twenty-one billion, two hundred twelve million, two hundred eleven thousand, three hundred thirty-two".