221082444280123 has 16 divisors (see below), whose sum is σ = 226418060915200. Its totient is φ = 215755721961696.

The previous prime is 221082444280121. The next prime is 221082444280147. The reversal of 221082444280123 is 321082444280122.

It is a cyclic number.

It is not a de Polignac number, because 221082444280123 - 2¹ = 221082444280121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221082444280123.

It is not an unprimeable number, because it can be changed into a prime (221082444280121) 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, 271877461 + ... + 272689417.

It is an arithmetic number, because the mean of its divisors is an integer number (14151128807200).

Almost surely, 2^{221082444280123} is an apocalyptic number.

221082444280123 is a deficient number, since it is larger than the sum of its proper divisors (5335616635077).

221082444280123 is a wasteful number, since it uses less digits than its factorization.

221082444280123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817426.

The product of its (nonzero) digits is 393216, while the sum is 43.

Subtracting 221082444280123 from its reverse (321082444280122), we obtain a palindrome (99999999999999).

The spelling of 221082444280123 in words is "two hundred twenty-one trillion, eighty-two billion, four hundred forty-four million, two hundred eighty thousand, one hundred twenty-three".