1200001010 has 64 divisors (see below), whose sum is σ = 2434682880. Its totient is φ = 422807040.

The previous prime is 1200001009. The next prime is 1200001013. The reversal of 1200001010 is 101000021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200000985 and 1200001003.

It is not an unprimeable number, because it can be changed into a prime (1200001013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292151 + ... + 296229.

It is an arithmetic number, because the mean of its divisors is an integer number (38041920).

Almost surely, 2^1200001010 is an apocalyptic number.

1200001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200001010 is an abundant number, since it is smaller than the sum of its proper divisors (1234681870).

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

1200001010 is a wasteful number, since it uses less digits than its factorization.

1200001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203.

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

The square root of 1200001010 is about 34641.0307294688. The cubic root of 1200001010 is about 1062.6588673173.

Adding to 1200001010 its reverse (101000021), we get a palindrome (1301001031).

The spelling of 1200001010 in words is "one billion, two hundred million, one thousand, ten".