1000120002 has 64 divisors (see below), whose sum is σ = 2335198464. Its totient is φ = 279659520.

The previous prime is 1000120001. The next prime is 1000120007. The reversal of 1000120002 is 2000210001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (1000120001) 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, 418852 + ... + 421232.

It is an arithmetic number, because the mean of its divisors is an integer number (36487476).

Almost surely, 2^1000120002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000120002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1167599232).

1000120002 is an abundant number, since it is smaller than the sum of its proper divisors (1335078462).

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

1000120002 is a wasteful number, since it uses less digits than its factorization.

1000120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1000120002 is about 31624.6739429832. The cubic root of 1000120002 is about 1000.0399990667.

Adding to 1000120002 its reverse (2000210001), we get a palindrome (3000330003).

It can be divided in two parts, 10001 and 20002, that multiplied together give a palindrome (200040002).

The spelling of 1000120002 in words is "one billion, one hundred twenty thousand, two".