2002222021021 has 2 divisors, whose sum is σ = 2002222021022. Its totient is φ = 2002222021020.

The previous prime is 2002222020961. The next prime is 2002222021043. The reversal of 2002222021021 is 1201202222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1714491696996 + 287730324025 = 1309386^2 + 536405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002222021021 - 2¹³ = 2002222012829 is a prime.

It is a super-2 number, since 2×2002222021021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2002222020986 and 2002222021004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002222021721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001111010510 + 1001111010511.

It is an arithmetic number, because the mean of its divisors is an integer number (1001111010511).

Almost surely, 2^{2002222021021} is an apocalyptic number.

It is an amenable number.

2002222021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002222021021 is an equidigital number, since it uses as much as digits as its factorization.

2002222021021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2002222021021 its reverse (1201202222002), we get a palindrome (3203424243023).

The spelling of 2002222021021 in words is "two trillion, two billion, two hundred twenty-two million, twenty-one thousand, twenty-one".