21031034002000 has 320 divisors, whose sum is σ = 56793605476608. Its totient is φ = 7466188800000.

The previous prime is 21031034001979. The next prime is 21031034002001. The reversal of 21031034002000 is 20043013012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031034002001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2649742032 + ... + 2649749968.

Almost surely, 2^{21031034002000} is an apocalyptic number.

21031034002000 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 21031034002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28396802738304).

21031034002000 is an abundant number, since it is smaller than the sum of its proper divisors (35762571474608).

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

21031034002000 is a wasteful number, since it uses less digits than its factorization.

21031034002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10815 (or 10799 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21031034002000 its reverse (20043013012), we get a palindrome (21051077015012).

The spelling of 21031034002000 in words is "twenty-one trillion, thirty-one billion, thirty-four million, two thousand".