1211111000200 has 24 divisors (see below), whose sum is σ = 2815833075930. Its totient is φ = 484444400000.

The previous prime is 1211111000173. The next prime is 1211111000227. The reversal of 1211111000200 is 20001111121.

It is an interprime number because it is at equal distance from previous prime (1211111000173) and next prime (1211111000227).

It can be written as a sum of positive squares in 3 ways, for example, as 457995976516 + 753115023684 = 676754^2 + 867822^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3027777301 + ... + 3027777700.

Almost surely, 2^{1211111000200} is an apocalyptic number.

1211111000200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211111000200 is an abundant number, since it is smaller than the sum of its proper divisors (1604722075730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211111000200 is a wasteful number, since it uses less digits than its factorization.

1211111000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055555017 (or 6055555008 counting only the distinct ones).

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

Adding to 1211111000200 its reverse (20001111121), we get a palindrome (1231112111321).

The spelling of 1211111000200 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred", and thus it is an aban number.