21120213332 has 12 divisors (see below), whose sum is σ = 36961391040. Its totient is φ = 10559815896.

The previous prime is 21120213319. The next prime is 21120213341. The reversal of 21120213332 is 23331202112.

It is a super-2 number, since 2×21120213332² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245183 + ... + 319929.

It is an arithmetic number, because the mean of its divisors is an integer number (3080115920).

Almost surely, 2^21120213332 is an apocalyptic number.

It is an amenable number.

21120213332 is a deficient number, since it is larger than the sum of its proper divisors (15841177708).

21120213332 is a wasteful number, since it uses less digits than its factorization.

21120213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145390 (or 145388 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21120213332 its reverse (23331202112), we get a palindrome (44451415444).

The spelling of 21120213332 in words is "twenty-one billion, one hundred twenty million, two hundred thirteen thousand, three hundred thirty-two".