1211412263 has 4 divisors (see below), whose sum is σ = 1237187040. Its totient is φ = 1185637488.

The previous prime is 1211412253. The next prime is 1211412269. The reversal of 1211412263 is 3622141121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3622141121 = 1459 ⋅2482619.

It is a cyclic number.

It is not a de Polignac number, because 1211412263 - 2¹⁰ = 1211411239 is a prime.

It is a super-3 number, since 3×1211412263³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211412269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12887318 + ... + 12887411.

It is an arithmetic number, because the mean of its divisors is an integer number (309296760).

Almost surely, 2^1211412263 is an apocalyptic number.

1211412263 is a deficient number, since it is larger than the sum of its proper divisors (25774777).

1211412263 is an equidigital number, since it uses as much as digits as its factorization.

1211412263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25774776.

The product of its digits is 576, while the sum is 23.

The square root of 1211412263 is about 34805.3481953564. The cubic root of 1211412263 is about 1066.0166515051.

Adding to 1211412263 its reverse (3622141121), we get a palindrome (4833553384).

The spelling of 1211412263 in words is "one billion, two hundred eleven million, four hundred twelve thousand, two hundred sixty-three".