21442221120113 has 4 divisors (see below), whose sum is σ = 21444918602100. Its totient is φ = 21439523638128.

The previous prime is 21442221120077. The next prime is 21442221120119. The reversal of 21442221120113 is 31102112224412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7909188779584 + 13533032340529 = 2812328^2 + 3678727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21442221120113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442221120119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348729070 + ... + 1348744967.

It is an arithmetic number, because the mean of its divisors is an integer number (5361229650525).

Almost surely, 2^{21442221120113} is an apocalyptic number.

It is an amenable number.

21442221120113 is a deficient number, since it is larger than the sum of its proper divisors (2697481987).

21442221120113 is an equidigital number, since it uses as much as digits as its factorization.

21442221120113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697481986.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 21442221120113 its reverse (31102112224412), we get a palindrome (52544333344525).

The spelling of 21442221120113 in words is "twenty-one trillion, four hundred forty-two billion, two hundred twenty-one million, one hundred twenty thousand, one hundred thirteen".