21124002242 has 8 divisors (see below), whose sum is σ = 36212575296. Its totient is φ = 9053143812.

The previous prime is 21124002199. The next prime is 21124002253. The reversal of 21124002242 is 24220042112.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754428638 + ... + 754428665.

It is an arithmetic number, because the mean of its divisors is an integer number (4526571912).

Almost surely, 2^21124002242 is an apocalyptic number.

21124002242 is a deficient number, since it is larger than the sum of its proper divisors (15088573054).

21124002242 is a wasteful number, since it uses less digits than its factorization.

21124002242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508857312.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21124002242 its reverse (24220042112), we get a palindrome (45344044354).

The spelling of 21124002242 in words is "twenty-one billion, one hundred twenty-four million, two thousand, two hundred forty-two".