21443513043122 has 16 divisors (see below), whose sum is σ = 33871096684800. Its totient is φ = 10153578088080.

The previous prime is 21443513043097. The next prime is 21443513043143. The reversal of 21443513043122 is 22134031534412.

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, 107550722 + ... + 107749917.

It is an arithmetic number, because the mean of its divisors is an integer number (2116943542800).

Almost surely, 2^{21443513043122} is an apocalyptic number.

21443513043122 is a deficient number, since it is larger than the sum of its proper divisors (12427583641678).

21443513043122 is a wasteful number, since it uses less digits than its factorization.

21443513043122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215303281.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 21443513043122 its reverse (22134031534412), we get a palindrome (43577544577534).

The spelling of 21443513043122 in words is "twenty-one trillion, four hundred forty-three billion, five hundred thirteen million, forty-three thousand, one hundred twenty-two".