1266112203 has 4 divisors (see below), whose sum is σ = 1688149608. Its totient is φ = 844074800.

The previous prime is 1266112193. The next prime is 1266112207. The reversal of 1266112203 is 3022116621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1266112203 - 2⁵ = 1266112171 is a prime.

It is a super-2 number, since 2×1266112203² = 3206080221171026418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1266112207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211018698 + ... + 211018703.

It is an arithmetic number, because the mean of its divisors is an integer number (422037402).

Almost surely, 2^1266112203 is an apocalyptic number.

1266112203 is a deficient number, since it is larger than the sum of its proper divisors (422037405).

1266112203 is an equidigital number, since it uses as much as digits as its factorization.

1266112203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422037404.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1266112203 is about 35582.4704454314. The cubic root of 1266112203 is about 1081.8259586041.

Adding to 1266112203 its reverse (3022116621), we get a palindrome (4288228824).

The spelling of 1266112203 in words is "one billion, two hundred sixty-six million, one hundred twelve thousand, two hundred three".