20112202202021 has 2 divisors, whose sum is σ = 20112202202022. Its totient is φ = 20112202202020.

The previous prime is 20112202202011. The next prime is 20112202202041. The reversal of 20112202202021 is 12020220221102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11695298785921 + 8416903416100 = 3419839^2 + 2901190^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112202202021 - 2⁶ = 20112202201957 is a prime.

It is a super-2 number, since 2×20112202202021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112202202011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056101101010 + 10056101101011.

It is an arithmetic number, because the mean of its divisors is an integer number (10056101101011).

Almost surely, 2^{20112202202021} is an apocalyptic number.

It is an amenable number.

20112202202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112202202021 is an equidigital number, since it uses as much as digits as its factorization.

20112202202021 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 17.

Adding to 20112202202021 its reverse (12020220221102), we get a palindrome (32132422423123).

The spelling of 20112202202021 in words is "twenty trillion, one hundred twelve billion, two hundred two million, two hundred two thousand, twenty-one".