111212231423 has 2 divisors, whose sum is σ = 111212231424. Its totient is φ = 111212231422.

The previous prime is 111212231419. The next prime is 111212231437. The reversal of 111212231423 is 324132212111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111212231423 - 2² = 111212231419 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111212231413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606115711 + 55606115712.

It is an arithmetic number, because the mean of its divisors is an integer number (55606115712).

Almost surely, 2^111212231423 is an apocalyptic number.

111212231423 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212231423 is an equidigital number, since it uses as much as digits as its factorization.

111212231423 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111212231423 its reverse (324132212111), we get a palindrome (435344443534).

The spelling of 111212231423 in words is "one hundred eleven billion, two hundred twelve million, two hundred thirty-one thousand, four hundred twenty-three".