1211222134 has 4 divisors (see below), whose sum is σ = 1816833204. Its totient is φ = 605611066.

The previous prime is 1211222099. The next prime is 1211222153. The reversal of 1211222134 is 4312221121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302805532 + ... + 302805535.

It is an arithmetic number, because the mean of its divisors is an integer number (454208301).

Almost surely, 2^1211222134 is an apocalyptic number.

1211222134 is a deficient number, since it is larger than the sum of its proper divisors (605611070).

1211222134 is an equidigital number, since it uses as much as digits as its factorization.

1211222134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605611069.

The product of its digits is 192, while the sum is 19.

The square root of 1211222134 is about 34802.6167694327. The cubic root of 1211222134 is about 1065.9608787814.

Adding to 1211222134 its reverse (4312221121), we get a palindrome (5523443255).

It can be divided in two parts, 121122 and 2134, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 1211222134 in words is "one billion, two hundred eleven million, two hundred twenty-two thousand, one hundred thirty-four".