21031033200000 has 384 divisors, whose sum is σ = 73932565825440. Its totient is φ = 5278371840000.

The previous prime is 21031033199977. The next prime is 21031033200103. The reversal of 21031033200000 is 233013012.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19884534 + ... + 20915466.

Almost surely, 2^{21031033200000} is an apocalyptic number.

21031033200000 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 21031033200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36966282912720).

21031033200000 is an abundant number, since it is smaller than the sum of its proper divisors (52901532625440).

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

21031033200000 is an equidigital number, since it uses as much as digits as its factorization.

21031033200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030992 (or 1030960 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21031033200000 its reverse (233013012), we get a palindrome (21031266213012).

The spelling of 21031033200000 in words is "twenty-one trillion, thirty-one billion, thirty-three million, two hundred thousand".