111432341021 has 2 divisors, whose sum is σ = 111432341022. Its totient is φ = 111432341020.

The previous prime is 111432341017. The next prime is 111432341101. The reversal of 111432341021 is 120143234111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110748518521 + 683822500 = 332789^2 + 26150^2 .

It is a cyclic number.

It is not a de Polignac number, because 111432341021 - 2² = 111432341017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111432341011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55716170510 + 55716170511.

It is an arithmetic number, because the mean of its divisors is an integer number (55716170511).

Almost surely, 2^111432341021 is an apocalyptic number.

It is an amenable number.

111432341021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111432341021 is an equidigital number, since it uses as much as digits as its factorization.

111432341021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 111432341021 its reverse (120143234111), we get a palindrome (231575575132).

The spelling of 111432341021 in words is "one hundred eleven billion, four hundred thirty-two million, three hundred forty-one thousand, twenty-one".