1211066256 has 20 divisors (see below), whose sum is σ = 3128587952. Its totient is φ = 403688736.

The previous prime is 1211066239. The next prime is 1211066261. The reversal of 1211066256 is 6526601121.

It is a super-3 number, since 3×1211066256³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12615226 + ... + 12615321.

Almost surely, 2^1211066256 is an apocalyptic number.

1211066256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1211066256 is an abundant number, since it is smaller than the sum of its proper divisors (1917521696).

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

1211066256 is a wasteful number, since it uses less digits than its factorization.

1211066256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25230558 (or 25230552 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1211066256 is about 34800.3772393346. The cubic root of 1211066256 is about 1065.9151489428.

Adding to 1211066256 its reverse (6526601121), we get a palindrome (7737667377).

The spelling of 1211066256 in words is "one billion, two hundred eleven million, sixty-six thousand, two hundred fifty-six".