21213033004 has 6 divisors (see below), whose sum is σ = 37122807764. Its totient is φ = 10606516500.

The previous prime is 21213032977. The next prime is 21213033043. The reversal of 21213033004 is 40033031212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651629122 + ... + 2651629129.

Almost surely, 2^21213033004 is an apocalyptic number.

It is an amenable number.

21213033004 is a deficient number, since it is larger than the sum of its proper divisors (15909774760).

21213033004 is a wasteful number, since it uses less digits than its factorization.

21213033004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303258255 (or 5303258253 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21213033004 its reverse (40033031212), we get a palindrome (61246064216).

The spelling of 21213033004 in words is "twenty-one billion, two hundred thirteen million, thirty-three thousand, four".