21124231402 has 8 divisors (see below), whose sum is σ = 31690905696. Its totient is φ = 10560596172.

The previous prime is 21124231391. The next prime is 21124231411. The reversal of 21124231402 is 20413242112.

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, 742308 + ... + 770239.

It is an arithmetic number, because the mean of its divisors is an integer number (3961363212).

Almost surely, 2^21124231402 is an apocalyptic number.

21124231402 is a deficient number, since it is larger than the sum of its proper divisors (10566674294).

21124231402 is a wasteful number, since it uses less digits than its factorization.

21124231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519532.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21124231402 its reverse (20413242112), we get a palindrome (41537473514).

The spelling of 21124231402 in words is "twenty-one billion, one hundred twenty-four million, two hundred thirty-one thousand, four hundred two".