2002011001221 has 64 divisors (see below), whose sum is σ = 3531635251200. Its totient is φ = 976648028160.

The previous prime is 2002011001213. The next prime is 2002011001373. The reversal of 2002011001221 is 1221001102002.

It is not a de Polignac number, because 2002011001221 - 2³ = 2002011001213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2002011001197 and 2002011001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002011001721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1195510 + ... + 2330936.

It is an arithmetic number, because the mean of its divisors is an integer number (55181800800).

Almost surely, 2^{2002011001221} is an apocalyptic number.

2002011001221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2002011001221 is a deficient number, since it is larger than the sum of its proper divisors (1529624249979).

2002011001221 is a wasteful number, since it uses less digits than its factorization.

2002011001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135914.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2002011001221 its reverse (1221001102002), we get a palindrome (3223012103223).

The spelling of 2002011001221 in words is "two trillion, two billion, eleven million, one thousand, two hundred twenty-one".