1002120000 has 280 divisors, whose sum is σ = 3789736896. Its totient is φ = 228864000.

The previous prime is 1002119999. The next prime is 1002120019. The reversal of 1002120000 is 212001.

It is a happy number.

1002120000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (280).

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 839404 + ... + 840596.

Almost surely, 2^1002120000 is an apocalyptic number.

1002120000 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 1002120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1894868448).

1002120000 is an abundant number, since it is smaller than the sum of its proper divisors (2787616896).

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

1002120000 is an equidigital number, since it uses as much as digits as its factorization.

1002120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1210 counting only the distinct ones).

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

The square root of 1002120000 is about 31656.2789980124. The cubic root of 1002120000 is about 1000.7061678762.

Adding to 1002120000 its reverse (212001), we get a palindrome (1002332001).

The spelling of 1002120000 in words is "one billion, two million, one hundred twenty thousand".