1223212134 has 16 divisors (see below), whose sum is σ = 2575183680. Its totient is φ = 386277480.

The previous prime is 1223212127. The next prime is 1223212139. The reversal of 1223212134 is 4312123221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223212134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223212139) 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, 5364852 + ... + 5365079.

It is an arithmetic number, because the mean of its divisors is an integer number (160948980).

Almost surely, 2^1223212134 is an apocalyptic number.

1223212134 is an abundant number, since it is smaller than the sum of its proper divisors (1351971546).

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

1223212134 is a wasteful number, since it uses less digits than its factorization.

1223212134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10729955.

The product of its digits is 576, while the sum is 21.

The square root of 1223212134 is about 34974.4497311966. The cubic root of 1223212134 is about 1069.4666844691.

Adding to 1223212134 its reverse (4312123221), we get a palindrome (5535335355).

The spelling of 1223212134 in words is "one billion, two hundred twenty-three million, two hundred twelve thousand, one hundred thirty-four".