111243433021431 has 32 divisors (see below), whose sum is σ = 153379375362048. Its totient is φ = 71643439768320.

The previous prime is 111243433021381. The next prime is 111243433021433. The reversal of 111243433021431 is 134120334342111.

It is a happy number.

It is not a de Polignac number, because 111243433021431 - 2²¹ = 111243430924279 is a prime.

It is a super-2 number, since 2×111243433021431² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111243433021392 and 111243433021401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111243433021433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123024795 + ... + 123925731.

It is an arithmetic number, because the mean of its divisors is an integer number (4793105480064).

Almost surely, 2^{111243433021431} is an apocalyptic number.

111243433021431 is a deficient number, since it is larger than the sum of its proper divisors (42135942340617).

111243433021431 is a wasteful number, since it uses less digits than its factorization.

111243433021431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903311.

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 111243433021431 its reverse (134120334342111), we get a palindrome (245363767363542).

The spelling of 111243433021431 in words is "one hundred eleven trillion, two hundred forty-three billion, four hundred thirty-three million, twenty-one thousand, four hundred thirty-one".