123221212134 has 16 divisors (see below), whose sum is σ = 246469324800. Its totient is φ = 41069253960.

The previous prime is 123221212133. The next prime is 123221212187. The reversal of 123221212134 is 431212122321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221212133) 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, 1061062 + ... + 1171449.

It is an arithmetic number, because the mean of its divisors is an integer number (15404332800).

Almost surely, 2^123221212134 is an apocalyptic number.

123221212134 is an abundant number, since it is smaller than the sum of its proper divisors (123248112666).

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

123221212134 is a wasteful number, since it uses less digits than its factorization.

123221212134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241715.

The product of its digits is 1152, while the sum is 24.

Adding to 123221212134 its reverse (431212122321), we get a palindrome (554433334455).

The spelling of 123221212134 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred twelve thousand, one hundred thirty-four".