1011111201 has 16 divisors (see below), whose sum is σ = 1576782400. Its totient is φ = 638596224.

The previous prime is 1011111197. The next prime is 1011111203. The reversal of 1011111201 is 1021111101.

It is not a de Polignac number, because 1011111201 - 2² = 1011111197 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011111203) 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, 984976 + ... + 986001.

It is an arithmetic number, because the mean of its divisors is an integer number (98548900).

Almost surely, 2^1011111201 is an apocalyptic number.

It is an amenable number.

1011111201 is a deficient number, since it is larger than the sum of its proper divisors (565671199).

1011111201 is a wasteful number, since it uses less digits than its factorization.

1011111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971005 (or 1970999 counting only the distinct ones).

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

The square root of 1011111201 is about 31797.9747940022. The cubic root of 1011111201 is about 1003.6901000789.

Adding to 1011111201 its reverse (1021111101), we get a palindrome (2032222302).

It can be divided in two parts, 10111 and 11201, that added together give a palindrome (21312).

The spelling of 1011111201 in words is "one billion, eleven million, one hundred eleven thousand, two hundred one".