1011321202320 has 480 divisors, whose sum is σ = 3992993432064. Its totient is φ = 226146816000.

The previous prime is 1011321202277. The next prime is 1011321202327. The reversal of 1011321202320 is 232021231101.

1011321202320 is a `hidden beast` number, since 1 + 0 + 1 + 1 + 321 + 20 + 2 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1011321202293 and 1011321202302.

It is not an unprimeable number, because it can be changed into a prime (1011321202327) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 195724377 + ... + 195729543.

Almost surely, 2^{1011321202320} is an apocalyptic number.

1011321202320 is a gapful number since it is divisible by the number (10) 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 1011321202320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996496716032).

1011321202320 is an abundant number, since it is smaller than the sum of its proper divisors (2981672229744).

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

1011321202320 is a wasteful number, since it uses less digits than its factorization.

1011321202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111 (or 7102 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1011321202320 its reverse (232021231101), we get a palindrome (1243342433421).

The spelling of 1011321202320 in words is "one trillion, eleven billion, three hundred twenty-one million, two hundred two thousand, three hundred twenty".