21043245351322 has 16 divisors (see below), whose sum is σ = 31840765350912. Its totient is φ = 10429799375520.

The previous prime is 21043245351319. The next prime is 21043245351341. The reversal of 21043245351322 is 22315354234012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35322579 + ... + 35913382.

It is an arithmetic number, because the mean of its divisors is an integer number (1990047834432).

Almost surely, 2^{21043245351322} is an apocalyptic number.

21043245351322 is a deficient number, since it is larger than the sum of its proper divisors (10797519999590).

21043245351322 is a wasteful number, since it uses less digits than its factorization.

21043245351322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71237253.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 21043245351322 its reverse (22315354234012), we get a palindrome (43358599585334).

The spelling of 21043245351322 in words is "twenty-one trillion, forty-three billion, two hundred forty-five million, three hundred fifty-one thousand, three hundred twenty-two".