1211150000 has 60 divisors (see below), whose sum is σ = 2933187264. Its totient is φ = 484440000.

The previous prime is 1211149993. The next prime is 1211150009. The reversal of 1211150000 is 511121.

It is not an unprimeable number, because it can be changed into a prime (1211150009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37889 + ... + 62111.

Almost surely, 2^1211150000 is an apocalyptic number.

1211150000 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 1211150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1466593632).

1211150000 is an abundant number, since it is smaller than the sum of its proper divisors (1722037264).

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

1211150000 is an frugal number, since it uses more digits than its factorization.

1211150000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24256 (or 24230 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1211150000 is about 34801.5804238831. The cubic root of 1211150000 is about 1065.9397173593.

Adding to 1211150000 its reverse (511121), we get a palindrome (1211661121).

The spelling of 1211150000 in words is "one billion, two hundred eleven million, one hundred fifty thousand".