1201111012 has 12 divisors (see below), whose sum is σ = 2102995440. Its totient is φ = 600255176.

The previous prime is 1201111007. The next prime is 1201111019. The reversal of 1201111012 is 2101111021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201111012.

It is not an unprimeable number, because it can be changed into a prime (1201111019) 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, 65962 + ... + 82177.

It is an arithmetic number, because the mean of its divisors is an integer number (175249620).

Almost surely, 2^1201111012 is an apocalyptic number.

It is an amenable number.

1201111012 is a deficient number, since it is larger than the sum of its proper divisors (901884428).

1201111012 is a wasteful number, since it uses less digits than its factorization.

1201111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150170 (or 150168 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1201111012 is about 34657.0485183029. The cubic root of 1201111012 is about 1062.9864198079.

Adding to 1201111012 its reverse (2101111021), we get a palindrome (3302222033).

Subtracting 1201111012 from its reverse (2101111021), we obtain a palindrome (900000009).

The spelling of 1201111012 in words is "one billion, two hundred one million, one hundred eleven thousand, twelve".