1111022001 has 12 divisors (see below), whose sum is σ = 1664247312. Its totient is φ = 740681172.

The previous prime is 1111021997. The next prime is 1111022009. The reversal of 1111022001 is 1002201111.

It is a happy number.

It is not a de Polignac number, because 1111022001 - 2² = 1111021997 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 (1111022009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2285811 + ... + 2286296.

It is an arithmetic number, because the mean of its divisors is an integer number (138687276).

Almost surely, 2^1111022001 is an apocalyptic number.

It is an amenable number.

1111022001 is a deficient number, since it is larger than the sum of its proper divisors (553225311).

1111022001 is an frugal number, since it uses more digits than its factorization.

1111022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572122 (or 4572110 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1111022001 is about 33331.9966548660. The cubic root of 1111022001 is about 1035.7164793277.

Adding to 1111022001 its reverse (1002201111), we get a palindrome (2113223112).

The spelling of 1111022001 in words is "one billion, one hundred eleven million, twenty-two thousand, one".