111356326421 has 4 divisors (see below), whose sum is σ = 112697968992. Its totient is φ = 110014683852.

The previous prime is 111356326399. The next prime is 111356326423. The reversal of 111356326421 is 124623653111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111356326421 - 2¹⁸ = 111356064277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111356326423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670821161 + ... + 670821326.

It is an arithmetic number, because the mean of its divisors is an integer number (28174492248).

Almost surely, 2^111356326421 is an apocalyptic number.

It is an amenable number.

111356326421 is a deficient number, since it is larger than the sum of its proper divisors (1341642571).

111356326421 is an equidigital number, since it uses as much as digits as its factorization.

111356326421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341642570.

The product of its digits is 25920, while the sum is 35.

Adding to 111356326421 its reverse (124623653111), we get a palindrome (235979979532).

The spelling of 111356326421 in words is "one hundred eleven billion, three hundred fifty-six million, three hundred twenty-six thousand, four hundred twenty-one".