21201444001113 has 32 divisors (see below), whose sum is σ = 29460197117952. Its totient is φ = 13547295316800.

The previous prime is 21201444001099. The next prime is 21201444001123. The reversal of 21201444001113 is 31110044410212.

It is a happy number.

It is not a de Polignac number, because 21201444001113 - 2¹⁴ = 21201443984729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201444001123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41971023 + ... + 42473163.

It is an arithmetic number, because the mean of its divisors is an integer number (920631159936).

Almost surely, 2^{21201444001113} is an apocalyptic number.

It is an amenable number.

21201444001113 is a deficient number, since it is larger than the sum of its proper divisors (8258753116839).

21201444001113 is a wasteful number, since it uses less digits than its factorization.

21201444001113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506525.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21201444001113 its reverse (31110044410212), we get a palindrome (52311488411325).

The spelling of 21201444001113 in words is "twenty-one trillion, two hundred one billion, four hundred forty-four million, one thousand, one hundred thirteen".