1010001200 has 120 divisors (see below), whose sum is σ = 2674547568. Its totient is φ = 364170240.

The previous prime is 1010001197. The next prime is 1010001203. The reversal of 1010001200 is 21000101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1010001197) and next prime (1010001203).

It is a Harshad number since it is a multiple of its sum of digits (5).

It is not an unprimeable number, because it can be changed into a prime (1010001203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221342 + ... + 225858.

Almost surely, 2^1010001200 is an apocalyptic number.

1010001200 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 1010001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337273784).

1010001200 is an abundant number, since it is smaller than the sum of its proper divisors (1664546368).

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

1010001200 is a wasteful number, since it uses less digits than its factorization.

1010001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591 (or 4580 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1010001200 is about 31780.5160436391. The cubic root of 1010001200 is about 1003.3226808973.

Adding to 1010001200 its reverse (21000101), we get a palindrome (1031001301).

The spelling of 1010001200 in words is "one billion, ten million, one thousand, two hundred".