21011323332 has 24 divisors (see below), whose sum is σ = 51910328736. Its totient is φ = 6591787648.

The previous prime is 21011323141. The next prime is 21011323343. The reversal of 21011323332 is 23332311012.

It is a junction number, because it is equal to n+sod(n) for n = 21011323299 and 21011323308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51498138 + ... + 51498545.

It is an arithmetic number, because the mean of its divisors is an integer number (2162930364).

Almost surely, 2^21011323332 is an apocalyptic number.

It is an amenable number.

21011323332 is an abundant number, since it is smaller than the sum of its proper divisors (30899005404).

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

21011323332 is a wasteful number, since it uses less digits than its factorization.

21011323332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102996707 (or 102996705 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21011323332 its reverse (23332311012), we get a palindrome (44343634344).

The spelling of 21011323332 in words is "twenty-one billion, eleven million, three hundred twenty-three thousand, three hundred thirty-two".