1211153200 has 60 divisors (see below), whose sum is σ = 2920794208. Its totient is φ = 482630400.

The previous prime is 1211153143. The next prime is 1211153213. The reversal of 1211153200 is 23511121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102814 + ... + 113986.

Almost surely, 2^1211153200 is an apocalyptic number.

1211153200 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 1211153200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460397104).

1211153200 is an abundant number, since it is smaller than the sum of its proper divisors (1709641008).

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

1211153200 is a wasteful number, since it uses less digits than its factorization.

1211153200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11462 (or 11451 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1211153200 is about 34801.6263987763. The cubic root of 1211153200 is about 1065.9406561376.

Adding to 1211153200 its reverse (23511121), we get a palindrome (1234664321).

The spelling of 1211153200 in words is "one billion, two hundred eleven million, one hundred fifty-three thousand, two hundred".