1211053568 has 60 divisors (see below), whose sum is σ = 2457225540. Its totient is φ = 596284416.

The previous prime is 1211053561. The next prime is 1211053579. The reversal of 1211053568 is 8653501121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211053561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3195203 + ... + 3195581.

It is an arithmetic number, because the mean of its divisors is an integer number (40953759).

Almost surely, 2^1211053568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211053568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228612770).

1211053568 is an abundant number, since it is smaller than the sum of its proper divisors (1246171972).

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

1211053568 is an frugal number, since it uses more digits than its factorization.

1211053568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1211053568 is about 34800.1949419827. The cubic root of 1211053568 is about 1065.9114264988.

Adding to 1211053568 its reverse (8653501121), we get a palindrome (9864554689).

The spelling of 1211053568 in words is "one billion, two hundred eleven million, fifty-three thousand, five hundred sixty-eight".