1213243122 has 64 divisors (see below), whose sum is σ = 2990453760. Its totient is φ = 319546944.

The previous prime is 1213243049. The next prime is 1213243127. The reversal of 1213243122 is 2213423121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1213243127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 795853 + ... + 797375.

It is an arithmetic number, because the mean of its divisors is an integer number (46725840).

Almost surely, 2^1213243122 is an apocalyptic number.

1213243122 is an abundant number, since it is smaller than the sum of its proper divisors (1777210638).

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

1213243122 is a wasteful number, since it uses less digits than its factorization.

1213243122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007.

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

The square root of 1213243122 is about 34831.6396685542. The cubic root of 1213243122 is about 1066.5534199867.

Adding to 1213243122 its reverse (2213423121), we get a palindrome (3426666243).

The spelling of 1213243122 in words is "one billion, two hundred thirteen million, two hundred forty-three thousand, one hundred twenty-two".