122121234 has 48 divisors (see below), whose sum is σ = 281049912. Its totient is φ = 38191104.

The previous prime is 122121203. The next prime is 122121239. The reversal of 122121234 is 432121221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 113103225 + 9018009 = 10635^2 + 3003^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (122121239) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 181122 + ... + 181794.

Almost surely, 2^122121234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122121234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140524956).

122121234 is an abundant number, since it is smaller than the sum of its proper divisors (158928678).

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

122121234 is a wasteful number, since it uses less digits than its factorization.

122121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1288 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 122121234 is about 11050.8476597952. The cubic root of 122121234 is about 496.1317965101.

Adding to 122121234 its reverse (432121221), we get a palindrome (554242455).

The spelling of 122121234 in words is "one hundred twenty-two million, one hundred twenty-one thousand, two hundred thirty-four".