111431423401 has 4 divisors (see below), whose sum is σ = 111524206804. Its totient is φ = 111338640000.

The previous prime is 111431423351. The next prime is 111431423423. The reversal of 111431423401 is 104324134111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104324134111 = 5407 ⋅19294273.

It can be written as a sum of positive squares in 2 ways, for example, as 126450025 + 111304973376 = 11245^2 + 333624^2 .

It is a cyclic number.

It is not a de Polignac number, because 111431423401 - 2⁷ = 111431423273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111431423461) 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, 46389900 + ... + 46392301.

It is an arithmetic number, because the mean of its divisors is an integer number (27881051701).

Almost surely, 2^111431423401 is an apocalyptic number.

It is an amenable number.

111431423401 is a deficient number, since it is larger than the sum of its proper divisors (92783403).

111431423401 is an equidigital number, since it uses as much as digits as its factorization.

111431423401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92783402.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 111431423401 its reverse (104324134111), we get a palindrome (215755557512).

The spelling of 111431423401 in words is "one hundred eleven billion, four hundred thirty-one million, four hundred twenty-three thousand, four hundred one".