21130043122 has 8 divisors (see below), whose sum is σ = 31736069676. Its totient is φ = 10551353232.

The previous prime is 21130043119. The next prime is 21130043131. The reversal of 21130043122 is 22134003112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20194967881 + 935075241 = 142109^2 + 30579^2 .

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 21130043122.

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, 6832233 + ... + 6835324.

Almost surely, 2^21130043122 is an apocalyptic number.

21130043122 is a deficient number, since it is larger than the sum of its proper divisors (10606026554).

21130043122 is a wasteful number, since it uses less digits than its factorization.

21130043122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13668332.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21130043122 its reverse (22134003112), we get a palindrome (43264046234).

The spelling of 21130043122 in words is "twenty-one billion, one hundred thirty million, forty-three thousand, one hundred twenty-two".