21051343322 has 16 divisors (see below), whose sum is σ = 33561677760. Its totient is φ = 9874874592.

The previous prime is 21051343309. The next prime is 21051343349. The reversal of 21051343322 is 22334315012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21051343291 and 21051343300.

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, 2685323 + ... + 2693150.

It is an arithmetic number, because the mean of its divisors is an integer number (2097604860).

Almost surely, 2^21051343322 is an apocalyptic number.

21051343322 is a deficient number, since it is larger than the sum of its proper divisors (12510334438).

21051343322 is a wasteful number, since it uses less digits than its factorization.

21051343322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378597.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21051343322 its reverse (22334315012), we get a palindrome (43385658334).

The spelling of 21051343322 in words is "twenty-one billion, fifty-one million, three hundred forty-three thousand, three hundred twenty-two".