1001213120 has 28 divisors (see below), whose sum is σ = 2384139504. Its totient is φ = 400485120.

The previous prime is 1001213119. The next prime is 1001213123. The reversal of 1001213120 is 213121001.

1001213120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1001213123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1564076 + ... + 1564715.

Almost surely, 2^1001213120 is an apocalyptic number.

1001213120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001213120 is an abundant number, since it is smaller than the sum of its proper divisors (1382926384).

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

1001213120 is an equidigital number, since it uses as much as digits as its factorization.

1001213120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128808 (or 3128798 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1001213120 is about 31641.9518993377. The cubic root of 1001213120 is about 1000.4042099257.

Adding to 1001213120 its reverse (213121001), we get a palindrome (1214334121).

It can be divided in two parts, 10012 and 13120, that added together give a palindrome (23132).

The spelling of 1001213120 in words is "one billion, one million, two hundred thirteen thousand, one hundred twenty".