21000021203332 has 24 divisors (see below), whose sum is σ = 37681906302656. Its totient is φ = 10234765080288.

The previous prime is 21000021203323. The next prime is 21000021203377. The reversal of 21000021203332 is 23330212000012.

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, 125268543 + ... + 125436070.

Almost surely, 2^{21000021203332} is an apocalyptic number.

It is an amenable number.

21000021203332 is a deficient number, since it is larger than the sum of its proper divisors (16681885099324).

21000021203332 is a wasteful number, since it uses less digits than its factorization.

21000021203332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250705147 (or 250705145 counting only the distinct ones).

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

Adding to 21000021203332 its reverse (23330212000012), we get a palindrome (44330233203344).

The spelling of 21000021203332 in words is "twenty-one trillion, twenty-one million, two hundred three thousand, three hundred thirty-two".