111232343821 has 2 divisors, whose sum is σ = 111232343822. Its totient is φ = 111232343820.

The previous prime is 111232343797. The next prime is 111232343869. The reversal of 111232343821 is 128343232111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105485945796 + 5746398025 = 324786^2 + 75805^2 .

It is a cyclic number.

It is not a de Polignac number, because 111232343821 - 2⁹ = 111232343309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111232313821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55616171910 + 55616171911.

It is an arithmetic number, because the mean of its divisors is an integer number (55616171911).

Almost surely, 2^111232343821 is an apocalyptic number.

It is an amenable number.

111232343821 is a deficient number, since it is larger than the sum of its proper divisors (1).

111232343821 is an equidigital number, since it uses as much as digits as its factorization.

111232343821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

Adding to 111232343821 its reverse (128343232111), we get a palindrome (239575575932).

The spelling of 111232343821 in words is "one hundred eleven billion, two hundred thirty-two million, three hundred forty-three thousand, eight hundred twenty-one".