2123022442 has 4 divisors (see below), whose sum is σ = 3184533666. Its totient is φ = 1061511220.

The previous prime is 2123022313. The next prime is 2123022463. The reversal of 2123022442 is 2442203212.

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., 2097731601 + 25290841 = 45801^2 + 5029^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530755609 + ... + 530755612.

Almost surely, 2^2123022442 is an apocalyptic number.

2123022442 is a deficient number, since it is larger than the sum of its proper divisors (1061511224).

2123022442 is a wasteful number, since it uses less digits than its factorization.

2123022442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061511223.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2123022442 is about 46076.2676656866. The cubic root of 2123022442 is about 1285.2418591216.

Adding to 2123022442 its reverse (2442203212), we get a palindrome (4565225654).

The spelling of 2123022442 in words is "two billion, one hundred twenty-three million, twenty-two thousand, four hundred forty-two".