111231120002 has 4 divisors (see below), whose sum is σ = 166846680006. Its totient is φ = 55615560000.

The previous prime is 111231119977. The next prime is 111231120031. The reversal of 111231120002 is 200021132111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200021132111 = 1493 ⋅133972627.

It can be written as a sum of positive squares in only one way, i.e., 96653213881 + 14577906121 = 310891^2 + 120739^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27807779999 + ... + 27807780002.

Almost surely, 2^111231120002 is an apocalyptic number.

111231120002 is a deficient number, since it is larger than the sum of its proper divisors (55615560004).

111231120002 is an equidigital number, since it uses as much as digits as its factorization.

111231120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55615560003.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 111231120002 its reverse (200021132111), we get a palindrome (311252252113).

The spelling of 111231120002 in words is "one hundred eleven billion, two hundred thirty-one million, one hundred twenty thousand, two".