21001020133004 has 24 divisors (see below), whose sum is σ = 37944612561408. Its totient is φ = 10163735487360.

The previous prime is 21001020132979. The next prime is 21001020133063. The reversal of 21001020133004 is 40033102010012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504132719 + ... + 504174374.

It is an arithmetic number, because the mean of its divisors is an integer number (1581025523392).

Almost surely, 2^{21001020133004} is an apocalyptic number.

It is an amenable number.

21001020133004 is a deficient number, since it is larger than the sum of its proper divisors (16943592428404).

21001020133004 is a wasteful number, since it uses less digits than its factorization.

21001020133004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008307265 (or 1008307263 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21001020133004 its reverse (40033102010012), we get a palindrome (61034122143016).

The spelling of 21001020133004 in words is "twenty-one trillion, one billion, twenty million, one hundred thirty-three thousand, four".