21321312203000 has 64 divisors (see below), whose sum is σ = 50128325413920. Its totient is φ = 8488105248000.

The previous prime is 21321312202997. The next prime is 21321312203057. The reversal of 21321312203000 is 30221312312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50313437 + ... + 50735436.

Almost surely, 2^{21321312203000} is an apocalyptic number.

21321312203000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321312203000 is an abundant number, since it is smaller than the sum of its proper divisors (28807013210920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21321312203000 is a wasteful number, since it uses less digits than its factorization.

21321312203000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101049105 (or 101049091 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21321312203000 its reverse (30221312312), we get a palindrome (21351533515312).

The spelling of 21321312203000 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twelve million, two hundred three thousand".