1212331242 has 16 divisors (see below), whose sum is σ = 2530082880. Its totient is φ = 386540352.

The previous prime is 1212331231. The next prime is 1212331243. The reversal of 1212331242 is 2421332121.

It is not an unprimeable number, because it can be changed into a prime (1212331243) 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 7 ways as a sum of consecutive naturals, for example, 4392367 + ... + 4392642.

It is an arithmetic number, because the mean of its divisors is an integer number (158130180).

Almost surely, 2^1212331242 is an apocalyptic number.

1212331242 is an abundant number, since it is smaller than the sum of its proper divisors (1317751638).

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

1212331242 is a wasteful number, since it uses less digits than its factorization.

1212331242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8785037.

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

The square root of 1212331242 is about 34818.5473849786. The cubic root of 1212331242 is about 1066.2861439342.

Adding to 1212331242 its reverse (2421332121), we get a palindrome (3633663363).

It can be divided in two parts, 12123 and 31242, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 1212331242 in words is "one billion, two hundred twelve million, three hundred thirty-one thousand, two hundred forty-two".