2011221001320 has 64 divisors (see below), whose sum is σ = 6196734990720. Its totient is φ = 521830312704.

The previous prime is 2011221001289. The next prime is 2011221001369. The reversal of 2011221001320 is 231001221102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2011221001320.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226484412 + ... + 226493291.

It is an arithmetic number, because the mean of its divisors is an integer number (96823984230).

Almost surely, 2^{2011221001320} is an apocalyptic number.

2011221001320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011221001320 is an abundant number, since it is smaller than the sum of its proper divisors (4185513989400).

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

2011221001320 is a wasteful number, since it uses less digits than its factorization.

2011221001320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452977754 (or 452977750 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2011221001320 its reverse (231001221102), we get a palindrome (2242222222422).

The spelling of 2011221001320 in words is "two trillion, eleven billion, two hundred twenty-one million, one thousand, three hundred twenty".