1912120200 has 144 divisors (see below), whose sum is σ = 6458115300. Its totient is φ = 506995200.

The previous prime is 1912120193. The next prime is 1912120229. The reversal of 1912120200 is 20212191.

It can be written as a sum of positive squares in 6 ways, for example, as 8892324 + 1903227876 = 2982^2 + 43626^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 322866 + ... + 328734.

Almost surely, 2^1912120200 is an apocalyptic number.

1912120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1912120200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3229057650).

1912120200 is an abundant number, since it is smaller than the sum of its proper divisors (4545995100).

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

1912120200 is a wasteful number, since it uses less digits than its factorization.

1912120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072 (or 6060 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1912120200 is about 43727.7966515579. The cubic root of 1912120200 is about 1241.1903674920.

Adding to 1912120200 its reverse (20212191), we get a palindrome (1932332391).

The spelling of 1912120200 in words is "one billion, nine hundred twelve million, one hundred twenty thousand, two hundred".