21231124402 has 8 divisors (see below), whose sum is σ = 32944848300. Its totient is φ = 10249508304.

The previous prime is 21231124393. The next prime is 21231124429. The reversal of 21231124402 is 20442113212.

It can be written as a sum of positive squares in 2 ways, for example, as 19237412601 + 1993711801 = 138699^2 + 44651^2 .

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, 183026877 + ... + 183026992.

Almost surely, 2^21231124402 is an apocalyptic number.

21231124402 is a deficient number, since it is larger than the sum of its proper divisors (11713723898).

21231124402 is a wasteful number, since it uses less digits than its factorization.

21231124402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366053900.

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

Adding to 21231124402 its reverse (20442113212), we get a palindrome (41673237614).

The spelling of 21231124402 in words is "twenty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, four hundred two".