1243210122 has 192 divisors, whose sum is σ = 3569080320. Its totient is φ = 303177600.

The previous prime is 1243210069. The next prime is 1243210127. The reversal of 1243210122 is 2210123421.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1243210095 and 1243210104.

It is not an unprimeable number, because it can be changed into a prime (1243210127) 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 95 ways as a sum of consecutive naturals, for example, 1880472 + ... + 1881132.

It is an arithmetic number, because the mean of its divisors is an integer number (18588960).

Almost surely, 2^1243210122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243210122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1784540160).

1243210122 is an abundant number, since it is smaller than the sum of its proper divisors (2325870198).

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

1243210122 is a wasteful number, since it uses less digits than its factorization.

1243210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 766 counting only the distinct ones).

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

The square root of 1243210122 is about 35259.1849310219. The cubic root of 1243210122 is about 1075.2633562811.

Adding to 1243210122 its reverse (2210123421), we get a palindrome (3453333543).

The spelling of 1243210122 in words is "one billion, two hundred forty-three million, two hundred ten thousand, one hundred twenty-two".