1001012200 has 48 divisors (see below), whose sum is σ = 2331106380. Its totient is φ = 399759360.

The previous prime is 1001012197. The next prime is 1001012203. The reversal of 1001012200 is 22101001.

It is an interprime number because it is at equal distance from previous prime (1001012197) and next prime (1001012203).

It can be written as a sum of positive squares in 6 ways, for example, as 527253444 + 473758756 = 22962^2 + 21766^2 .

It is not an unprimeable number, because it can be changed into a prime (1001012203) 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, 131704 + ... + 139096.

Almost surely, 2^1001012200 is an apocalyptic number.

1001012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001012200 is an abundant number, since it is smaller than the sum of its proper divisors (1330094180).

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

1001012200 is a wasteful number, since it uses less digits than its factorization.

1001012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8086 (or 8077 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1001012200 is about 31638.7768410854. The cubic root of 1001012200 is about 1000.3372862252.

Adding to 1001012200 its reverse (22101001), we get a palindrome (1023113201).

The spelling of 1001012200 in words is "one billion, one million, twelve thousand, two hundred".