1111121423 has 2 divisors, whose sum is σ = 1111121424. Its totient is φ = 1111121422.

The previous prime is 1111121383. The next prime is 1111121441. The reversal of 1111121423 is 3241211111.

It is a strong prime.

It is an emirp because it is prime and its reverse (3241211111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111121423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111121483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555560711 + 555560712.

It is an arithmetic number, because the mean of its divisors is an integer number (555560712).

Almost surely, 2^1111121423 is an apocalyptic number.

1111121423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111121423 is an equidigital number, since it uses as much as digits as its factorization.

1111121423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 17.

The square root of 1111121423 is about 33333.4880113078. The cubic root of 1111121423 is about 1035.7473727850.

Adding to 1111121423 its reverse (3241211111), we get a palindrome (4352332534).

The spelling of 1111121423 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, four hundred twenty-three".