21000000322000 has 160 divisors (see below), whose sum is σ = 58129885592064. Its totient is φ = 7187855616000.

The previous prime is 21000000321997. The next prime is 21000000322069. The reversal of 21000000322000 is 22300000012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7037245 + ... + 9566755.

Almost surely, 2^{21000000322000} is an apocalyptic number.

21000000322000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000000322000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29064942796032).

21000000322000 is an abundant number, since it is smaller than the sum of its proper divisors (37129885270064).

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

21000000322000 is a wasteful number, since it uses less digits than its factorization.

21000000322000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530134 (or 2530118 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 21000000322000 its reverse (22300000012), we get a palindrome (21022300322012).

The spelling of 21000000322000 in words is "twenty-one trillion, three hundred twenty-two thousand".