111243224451 has 16 divisors (see below), whose sum is σ = 150765937664. Its totient is φ = 72946868544.

The previous prime is 111243224447. The next prime is 111243224461. The reversal of 111243224451 is 154422342111.

It is not a de Polignac number, because 111243224451 - 2² = 111243224447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111243224401) 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, 611671 + ... + 772416.

It is an arithmetic number, because the mean of its divisors is an integer number (9422871104).

Almost surely, 2^111243224451 is an apocalyptic number.

111243224451 is a deficient number, since it is larger than the sum of its proper divisors (39522713213).

111243224451 is a wasteful number, since it uses less digits than its factorization.

111243224451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384530.

The product of its digits is 7680, while the sum is 30.

Adding to 111243224451 its reverse (154422342111), we get a palindrome (265665566562).

The spelling of 111243224451 in words is "one hundred eleven billion, two hundred forty-three million, two hundred twenty-four thousand, four hundred fifty-one".