1123212442 has 16 divisors (see below), whose sum is σ = 1847320992. Its totient is φ = 507957520.

The previous prime is 1123212407. The next prime is 1123212451. The reversal of 1123212442 is 2442123211.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125248 + ... + 133915.

It is an arithmetic number, because the mean of its divisors is an integer number (115457562).

Almost surely, 2^1123212442 is an apocalyptic number.

1123212442 is a deficient number, since it is larger than the sum of its proper divisors (724108550).

1123212442 is a wasteful number, since it uses less digits than its factorization.

1123212442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259373.

The product of its digits is 768, while the sum is 22.

The square root of 1123212442 is about 33514.3617274744. The cubic root of 1123212442 is about 1039.4907646239.

Adding to 1123212442 its reverse (2442123211), we get a palindrome (3565335653).

The spelling of 1123212442 in words is "one billion, one hundred twenty-three million, two hundred twelve thousand, four hundred forty-two".