21000330335044 has 12 divisors (see below), whose sum is σ = 37039952717824. Its totient is φ = 10417486701384.

The previous prime is 21000330335027. The next prime is 21000330335053. The reversal of 21000330335044 is 44053303300012.

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, 20669615964 + ... + 20669616979.

Almost surely, 2^{21000330335044} is an apocalyptic number.

It is an amenable number.

21000330335044 is a deficient number, since it is larger than the sum of its proper divisors (16039622382780).

21000330335044 is a wasteful number, since it uses less digits than its factorization.

21000330335044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41339233074 (or 41339233072 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 21000330335044 its reverse (44053303300012), we get a palindrome (65053633635056).

The spelling of 21000330335044 in words is "twenty-one trillion, three hundred thirty million, three hundred thirty-five thousand, forty-four".