21446445421113 has 4 divisors (see below), whose sum is σ = 28595260561488. Its totient is φ = 14297630280740.

The previous prime is 21446445421039. The next prime is 21446445421117. The reversal of 21446445421113 is 31112454464412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21446445421113 - 2¹² = 21446445417017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21446445421117) 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, 3574407570183 + ... + 3574407570188.

It is an arithmetic number, because the mean of its divisors is an integer number (7148815140372).

Almost surely, 2^{21446445421113} is an apocalyptic number.

It is an amenable number.

21446445421113 is a deficient number, since it is larger than the sum of its proper divisors (7148815140375).

21446445421113 is an equidigital number, since it uses as much as digits as its factorization.

21446445421113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7148815140374.

The product of its digits is 368640, while the sum is 42.

Adding to 21446445421113 its reverse (31112454464412), we get a palindrome (52558899885525).

The spelling of 21446445421113 in words is "twenty-one trillion, four hundred forty-six billion, four hundred forty-five million, four hundred twenty-one thousand, one hundred thirteen".