1012111001 has 16 divisors (see below), whose sum is σ = 1117404288. Its totient is φ = 909072000.

The previous prime is 1012110989. The next prime is 1012111039. The reversal of 1012111001 is 1001112101.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012111001 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012111001.

It is not an unprimeable number, because it can be changed into a prime (1012111091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951596 + ... + 952658.

It is an arithmetic number, because the mean of its divisors is an integer number (69837768).

Almost surely, 2^1012111001 is an apocalyptic number.

1012111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012111001 is a deficient number, since it is larger than the sum of its proper divisors (105293287).

1012111001 is a wasteful number, since it uses less digits than its factorization.

1012111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1012111001 is about 31813.6920366059. The cubic root of 1012111001 is about 1004.0208117382.

Adding to 1012111001 its reverse (1001112101), we get a palindrome (2013223102).

The spelling of 1012111001 in words is "one billion, twelve million, one hundred eleven thousand, one".