111220556423 has 8 divisors (see below), whose sum is σ = 112081182240. Its totient is φ = 110360638080.

The previous prime is 111220556413. The next prime is 111220556437. The reversal of 111220556423 is 324655022111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220556423 is a prime.

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 111220556423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220556413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140963 + ... + 492251.

It is an arithmetic number, because the mean of its divisors is an integer number (14010147780).

Almost surely, 2^111220556423 is an apocalyptic number.

111220556423 is a deficient number, since it is larger than the sum of its proper divisors (860625817).

111220556423 is a wasteful number, since it uses less digits than its factorization.

111220556423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353737.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 111220556423 its reverse (324655022111), we get a palindrome (435875578534).

The spelling of 111220556423 in words is "one hundred eleven billion, two hundred twenty million, five hundred fifty-six thousand, four hundred twenty-three".