1112121111001 has 4 divisors (see below), whose sum is σ = 1122514766352. Its totient is φ = 1101727455652.

The previous prime is 1112121110941. The next prime is 1112121111071. The reversal of 1112121111001 is 1001111212111.

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 1112121111001 - 2³⁷ = 974682157529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1112121111071) 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, 5196827515 + ... + 5196827728.

It is an arithmetic number, because the mean of its divisors is an integer number (280628691588).

Almost surely, 2^{1112121111001} is an apocalyptic number.

It is an amenable number.

1112121111001 is a deficient number, since it is larger than the sum of its proper divisors (10393655351).

1112121111001 is a wasteful number, since it uses less digits than its factorization.

1112121111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10393655350.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1112121111001 its reverse (1001111212111), we get a palindrome (2113232323112).

It can be divided in two parts, 111212111 and 1001, that multiplied together give a palindrome (111323323111).

The spelling of 1112121111001 in words is "one trillion, one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, one".