2121244442 has 4 divisors (see below), whose sum is σ = 3181866666. Its totient is φ = 1060622220.

The previous prime is 2121244421. The next prime is 2121244451. The reversal of 2121244442 is 2444421212.

It is a happy number.

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., 1777549921 + 343694521 = 42161^2 + 18539^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530311109 + ... + 530311112.

Almost surely, 2^2121244442 is an apocalyptic number.

2121244442 is a deficient number, since it is larger than the sum of its proper divisors (1060622224).

2121244442 is a wasteful number, since it uses less digits than its factorization.

2121244442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060622223.

The product of its digits is 4096, while the sum is 26.

The square root of 2121244442 is about 46056.9695268805. The cubic root of 2121244442 is about 1284.8829685440.

Adding to 2121244442 its reverse (2444421212), we get a palindrome (4565665654).

The spelling of 2121244442 in words is "two billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred forty-two".