1211268867 has 8 divisors (see below), whose sum is σ = 1700026560. Its totient is φ = 765011880.

The previous prime is 1211268857. The next prime is 1211268871. The reversal of 1211268867 is 7688621121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211268867 - 2¹⁰ = 1211267843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211268847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10625109 + ... + 10625222.

It is an arithmetic number, because the mean of its divisors is an integer number (212503320).

Almost surely, 2^1211268867 is an apocalyptic number.

1211268867 is a deficient number, since it is larger than the sum of its proper divisors (488757693).

1211268867 is a wasteful number, since it uses less digits than its factorization.

1211268867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21250353.

The product of its digits is 64512, while the sum is 42.

The square root of 1211268867 is about 34803.2881636204. The cubic root of 1211268867 is about 1065.9745880501.

Adding to 1211268867 its reverse (7688621121), we get a palindrome (8899889988).

The spelling of 1211268867 in words is "one billion, two hundred eleven million, two hundred sixty-eight thousand, eight hundred sixty-seven".