1213000200 has 144 divisors (see below), whose sum is σ = 4088572020. Its totient is φ = 322283520.

The previous prime is 1213000181. The next prime is 1213000213. The reversal of 1213000200 is 20003121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1542564 + 1211457636 = 1242^2 + 34806^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 562324 + ... + 564476.

Almost surely, 2^1213000200 is an apocalyptic number.

1213000200 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 1213000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2044286010).

1213000200 is an abundant number, since it is smaller than the sum of its proper divisors (2875571820).

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

1213000200 is a wasteful number, since it uses less digits than its factorization.

1213000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1213000200 is about 34828.1524057766. The cubic root of 1213000200 is about 1066.4822315664.

Adding to 1213000200 its reverse (20003121), we get a palindrome (1233003321).

The spelling of 1213000200 in words is "one billion, two hundred thirteen million, two hundred", and thus it is an aban number.