2002012022221 has 8 divisors (see below), whose sum is σ = 2056985552120. Its totient is φ = 1947084023808.

The previous prime is 2002012022191. The next prime is 2002012022233. The reversal of 2002012022221 is 1222202102002.

It can be written as a sum of positive squares in 4 ways, for example, as 647604858121 + 1354407164100 = 804739^2 + 1163790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2002012022221 - 2⁵ = 2002012022189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002012022195 and 2002012022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002012022261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11293716 + ... + 11469613.

It is an arithmetic number, because the mean of its divisors is an integer number (257123194015).

Almost surely, 2^{2002012022221} is an apocalyptic number.

It is an amenable number.

2002012022221 is a deficient number, since it is larger than the sum of its proper divisors (54973529899).

2002012022221 is a wasteful number, since it uses less digits than its factorization.

2002012022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22765743.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2002012022221 its reverse (1222202102002), we get a palindrome (3224214124223).

The spelling of 2002012022221 in words is "two trillion, two billion, twelve million, twenty-two thousand, two hundred twenty-one".