21033312322 has 32 divisors (see below), whose sum is σ = 38360796480. Its totient is φ = 8524615680.

The previous prime is 21033312281. The next prime is 21033312329. The reversal of 21033312322 is 22321333012.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21033312293 and 21033312302.

It is not an unprimeable number, because it can be changed into a prime (21033312329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1472863 + ... + 1487074.

It is an arithmetic number, because the mean of its divisors is an integer number (1198774890).

Almost surely, 2^21033312322 is an apocalyptic number.

21033312322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21033312322 is a deficient number, since it is larger than the sum of its proper divisors (17327484158).

21033312322 is a wasteful number, since it uses less digits than its factorization.

21033312322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959986.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21033312322 its reverse (22321333012), we get a palindrome (43354645334).

The spelling of 21033312322 in words is "twenty-one billion, thirty-three million, three hundred twelve thousand, three hundred twenty-two".