1211030000 has 100 divisors (see below), whose sum is σ = 2948899800. Its totient is φ = 481632000.

The previous prime is 1211029993. The next prime is 1211030033. The reversal of 1211030000 is 301121.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1211030000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3469826 + ... + 3470174.

It is an arithmetic number, because the mean of its divisors is an integer number (29488998).

Almost surely, 2^1211030000 is an apocalyptic number.

1211030000 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 1211030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474449900).

1211030000 is an abundant number, since it is smaller than the sum of its proper divisors (1737869800).

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

1211030000 is an equidigital number, since it uses as much as digits as its factorization.

1211030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1211030000 is about 34799.8563215425. The cubic root of 1211030000 is about 1065.9045119785.

Adding to 1211030000 its reverse (301121), we get a palindrome (1211331121).

The spelling of 1211030000 in words is "one billion, two hundred eleven million, thirty thousand".