1212213242 has 4 divisors (see below), whose sum is σ = 1818319866. Its totient is φ = 606106620.

The previous prime is 1212213241. The next prime is 1212213251. The reversal of 1212213242 is 2423122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 903543481 + 308669761 = 30059^2 + 17569^2 .

It is not an unprimeable number, because it can be changed into a prime (1212213241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303053309 + ... + 303053312.

Almost surely, 2^1212213242 is an apocalyptic number.

1212213242 is a deficient number, since it is larger than the sum of its proper divisors (606106624).

1212213242 is an equidigital number, since it uses as much as digits as its factorization.

1212213242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606106623.

The product of its digits is 384, while the sum is 20.

The square root of 1212213242 is about 34816.8528445637. The cubic root of 1212213242 is about 1066.2515478208.

Adding to 1212213242 its reverse (2423122121), we get a palindrome (3635335363).

The spelling of 1212213242 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, two hundred forty-two".