320011021000 has 128 divisors (see below), whose sum is σ = 820570383360. Its totient is φ = 115844928000.

The previous prime is 320011020983. The next prime is 320011021021. The reversal of 320011021000 is 120110023.

It is a super-2 number, since 2×320011021000² (a number of 24 digits) contains 22 as substring.

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

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, 2387772 + ... + 2518228.

It is an arithmetic number, because the mean of its divisors is an integer number (6410706120).

Almost surely, 2^320011021000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320011021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410285191680).

320011021000 is an abundant number, since it is smaller than the sum of its proper divisors (500559362360).

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

320011021000 is a wasteful number, since it uses less digits than its factorization.

320011021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130712 (or 130698 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 320011021000 its reverse (120110023), we get a palindrome (320131131023).

The spelling of 320011021000 in words is "three hundred twenty billion, eleven million, twenty-one thousand".