221320010445 has 16 divisors (see below), whose sum is σ = 358962868032. Its totient is φ = 116420388480.

The previous prime is 221320010423. The next prime is 221320010447. The reversal of 221320010445 is 544010023122.

It is not a de Polignac number, because 221320010445 - 2¹⁴ = 221319994061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221320010447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101058271 + ... + 101060460.

It is an arithmetic number, because the mean of its divisors is an integer number (22435179252).

Almost surely, 2^221320010445 is an apocalyptic number.

It is an amenable number.

221320010445 is a deficient number, since it is larger than the sum of its proper divisors (137642857587).

221320010445 is a wasteful number, since it uses less digits than its factorization.

221320010445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202118812.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 221320010445 its reverse (544010023122), we get a palindrome (765330033567).

The spelling of 221320010445 in words is "two hundred twenty-one billion, three hundred twenty million, ten thousand, four hundred forty-five".