2002011001220 has 24 divisors (see below), whose sum is σ = 4205514066264. Its totient is φ = 800558502656.

The previous prime is 2002011001213. The next prime is 2002011001373. The reversal of 2002011001220 is 221001102002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 733342173316 + 1268668827904 = 856354^2 + 1126352^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15301847 + ... + 15432126.

It is an arithmetic number, because the mean of its divisors is an integer number (175229752761).

Almost surely, 2^{2002011001220} is an apocalyptic number.

2002011001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2002011001220 is an abundant number, since it is smaller than the sum of its proper divisors (2203503065044).

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

2002011001220 is a wasteful number, since it uses less digits than its factorization.

2002011001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30737239 (or 30737237 counting only the distinct ones).

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

Adding to 2002011001220 its reverse (221001102002), we get a palindrome (2223012103222).

The spelling of 2002011001220 in words is "two trillion, two billion, eleven million, one thousand, two hundred twenty".