1200100311 has 12 divisors (see below), whose sum is σ = 1735452888. Its totient is φ = 799155504.

The previous prime is 1200100273. The next prime is 1200100331. The reversal of 1200100311 is 1130010021.

It is a de Polignac number, because none of the positive numbers 2^k-1200100311 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200100293 and 1200100302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100331) 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, 67560 + ... + 83453.

It is an arithmetic number, because the mean of its divisors is an integer number (144621074).

Almost surely, 2^1200100311 is an apocalyptic number.

1200100311 is a deficient number, since it is larger than the sum of its proper divisors (535352577).

1200100311 is a wasteful number, since it uses less digits than its factorization.

1200100311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151902 (or 151899 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1200100311 is about 34642.4639856925. The cubic root of 1200100311 is about 1062.6881784531.

Adding to 1200100311 its reverse (1130010021), we get a palindrome (2330110332).

The spelling of 1200100311 in words is "one billion, two hundred million, one hundred thousand, three hundred eleven".