21012113332 has 24 divisors (see below), whose sum is σ = 42259008960. Its totient is φ = 8954880960.

The previous prime is 21012113323. The next prime is 21012113347. The reversal of 21012113332 is 23331121012.

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 7 ways as a sum of consecutive naturals, for example, 2091169 + ... + 2101192.

It is an arithmetic number, because the mean of its divisors is an integer number (1760792040).

Almost surely, 2^21012113332 is an apocalyptic number.

It is an amenable number.

21012113332 is an abundant number, since it is smaller than the sum of its proper divisors (21246895628).

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

21012113332 is a wasteful number, since it uses less digits than its factorization.

21012113332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4192551 (or 4192549 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21012113332 its reverse (23331121012), we get a palindrome (44343234344).

The spelling of 21012113332 in words is "twenty-one billion, twelve million, one hundred thirteen thousand, three hundred thirty-two".