1212111242 has 8 divisors (see below), whose sum is σ = 1821204000. Its totient is φ = 605043244.

The previous prime is 1212111239. The next prime is 1212111317. The reversal of 1212111242 is 2421112121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1212111242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504692 + ... + 507087.

It is an arithmetic number, because the mean of its divisors is an integer number (227650500).

Almost surely, 2^1212111242 is an apocalyptic number.

1212111242 is a deficient number, since it is larger than the sum of its proper divisors (609092758).

1212111242 is a wasteful number, since it uses less digits than its factorization.

1212111242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012380.

The product of its digits is 64, while the sum is 17.

The square root of 1212111242 is about 34815.3880058804. The cubic root of 1212111242 is about 1066.2216408967.

Adding to 1212111242 its reverse (2421112121), we get a palindrome (3633223363).

The spelling of 1212111242 in words is "one billion, two hundred twelve million, one hundred eleven thousand, two hundred forty-two".