22121320143 has 16 divisors (see below), whose sum is σ = 31770740736. Its totient is φ = 13610208480.

The previous prime is 22121320139. The next prime is 22121320153. The reversal of 22121320143 is 34102312122.

It is not a de Polignac number, because 22121320143 - 2² = 22121320139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121320103) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 131746 + ... + 248192.

It is an arithmetic number, because the mean of its divisors is an integer number (1985671296).

Almost surely, 2^22121320143 is an apocalyptic number.

22121320143 is a deficient number, since it is larger than the sum of its proper divisors (9649420593).

22121320143 is a wasteful number, since it uses less digits than its factorization.

22121320143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121334.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 22121320143 its reverse (34102312122), we get a palindrome (56223632265).

The spelling of 22121320143 in words is "twenty-two billion, one hundred twenty-one million, three hundred twenty thousand, one hundred forty-three".