2001120001220 has 12 divisors (see below), whose sum is σ = 4202352002604. Its totient is φ = 800448000480.

The previous prime is 2001120001207. The next prime is 2001120001249. The reversal of 2001120001220 is 221000211002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1596300848704 + 404819152516 = 1263448^2 + 636254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50028000011 + ... + 50028000050.

It is an arithmetic number, because the mean of its divisors is an integer number (350196000217).

Almost surely, 2^{2001120001220} is an apocalyptic number.

2001120001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001120001220 is an abundant number, since it is smaller than the sum of its proper divisors (2201232001384).

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

2001120001220 is a wasteful number, since it uses less digits than its factorization.

2001120001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100056000070 (or 100056000068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2001120001220 its reverse (221000211002), we get a palindrome (2222120212222).

The spelling of 2001120001220 in words is "two trillion, one billion, one hundred twenty million, one thousand, two hundred twenty".