111221144825 has 24 divisors (see below), whose sum is σ = 157735356672. Its totient is φ = 76208296320.

The previous prime is 111221144813. The next prime is 111221144831. The reversal of 111221144825 is 528441122111.

It is not a de Polignac number, because 111221144825 - 2¹⁸ = 111220882681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221144791 and 111221144800.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7244 + ... + 471693.

It is an arithmetic number, because the mean of its divisors is an integer number (6572306528).

Almost surely, 2^111221144825 is an apocalyptic number.

It is an amenable number.

111221144825 is a deficient number, since it is larger than the sum of its proper divisors (46514211847).

111221144825 is a wasteful number, since it uses less digits than its factorization.

111221144825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480281 (or 480276 counting only the distinct ones).

The product of its digits is 5120, while the sum is 32.

Adding to 111221144825 its reverse (528441122111), we get a palindrome (639662266936).

The spelling of 111221144825 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred forty-four thousand, eight hundred twenty-five".