1121111001 has 24 divisors (see below), whose sum is σ = 1673378304. Its totient is φ = 722537280.

The previous prime is 1121110997. The next prime is 1121111023. The reversal of 1121111001 is 1001111211.

1121111001 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1121111001 - 2² = 1121110997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1121111051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 402325 + ... + 405101.

It is an arithmetic number, because the mean of its divisors is an integer number (69724096).

Almost surely, 2^1121111001 is an apocalyptic number.

It is an amenable number.

1121111001 is a deficient number, since it is larger than the sum of its proper divisors (552267303).

1121111001 is a wasteful number, since it uses less digits than its factorization.

1121111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261 (or 4258 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 1121111001 is about 33482.9956993098. The cubic root of 1121111001 is about 1038.8420917801.

Adding to 1121111001 its reverse (1001111211), we get a palindrome (2122222212).

The spelling of 1121111001 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one".