2001022201320 has 64 divisors (see below), whose sum is σ = 6003206421120. Its totient is φ = 533593492224.

The previous prime is 2001022201273. The next prime is 2001022201361. The reversal of 2001022201320 is 231022201002.

It is a happy number.

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 2001022201320.

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, 5729229 + ... + 6068451.

It is an arithmetic number, because the mean of its divisors is an integer number (93800100330).

Almost surely, 2^{2001022201320} is an apocalyptic number.

2001022201320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001022201320 is an abundant number, since it is smaller than the sum of its proper divisors (4002184219800).

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

2001022201320 is a wasteful number, since it uses less digits than its factorization.

2001022201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388394 (or 388390 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 2001022201320 its reverse (231022201002), we get a palindrome (2232044402322).

The spelling of 2001022201320 in words is "two trillion, one billion, twenty-two million, two hundred one thousand, three hundred twenty".