21004314124 has 6 divisors (see below), whose sum is σ = 36757549724. Its totient is φ = 10502157060.

The previous prime is 21004314119. The next prime is 21004314131. The reversal of 21004314124 is 42141340012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21004314095 and 21004314104.

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 as a sum of consecutive naturals, namely, 2625539262 + ... + 2625539269.

Almost surely, 2^21004314124 is an apocalyptic number.

It is an amenable number.

21004314124 is a deficient number, since it is larger than the sum of its proper divisors (15753235600).

21004314124 is a wasteful number, since it uses less digits than its factorization.

21004314124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251078535 (or 5251078533 counting only the distinct ones).

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

Adding to 21004314124 its reverse (42141340012), we get a palindrome (63145654136).

The spelling of 21004314124 in words is "twenty-one billion, four million, three hundred fourteen thousand, one hundred twenty-four".