111122112001 has 4 divisors (see below), whose sum is σ = 111126857904. Its totient is φ = 111117366100.

The previous prime is 111122111963. The next prime is 111122112011. The reversal of 111122112001 is 100211221111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111122112001 - 2¹⁷ = 111121980929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111122112011) 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, 2337655 + ... + 2384716.

It is an arithmetic number, because the mean of its divisors is an integer number (27781714476).

Almost surely, 2^111122112001 is an apocalyptic number.

It is an amenable number.

111122112001 is a deficient number, since it is larger than the sum of its proper divisors (4745903).

111122112001 is an equidigital number, since it uses as much as digits as its factorization.

111122112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745902.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111122112001 its reverse (100211221111), we get a palindrome (211333333112).

The spelling of 111122112001 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, one".