111231001019 has 2 divisors, whose sum is σ = 111231001020. Its totient is φ = 111231001018.

The previous prime is 111231000989. The next prime is 111231001033. The reversal of 111231001019 is 910100132111.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (910100132111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111231001019 - 2²⁴ = 111214223803 is a prime.

It is a super-2 number, since 2×111231001019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111231004019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615500509 + 55615500510.

It is an arithmetic number, because the mean of its divisors is an integer number (55615500510).

Almost surely, 2^111231001019 is an apocalyptic number.

111231001019 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231001019 is an equidigital number, since it uses as much as digits as its factorization.

111231001019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 111231001019 in words is "one hundred eleven billion, two hundred thirty-one million, one thousand, nineteen".