2123440442 has 8 divisors (see below), whose sum is σ = 3245258196. Its totient is φ = 1041687712.

The previous prime is 2123440393. The next prime is 2123440493. The reversal of 2123440442 is 2440443212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2044034521 + 79405921 = 45211^2 + 8911^2 .

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

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, 10016123 + ... + 10016334.

Almost surely, 2^2123440442 is an apocalyptic number.

2123440442 is a deficient number, since it is larger than the sum of its proper divisors (1121817754).

2123440442 is a wasteful number, since it uses less digits than its factorization.

2123440442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20032512.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 2123440442 is about 46080.8034001145. The cubic root of 2123440442 is about 1285.3262036285.

Adding to 2123440442 its reverse (2440443212), we get a palindrome (4563883654).

The spelling of 2123440442 in words is "two billion, one hundred twenty-three million, four hundred forty thousand, four hundred forty-two".