12202020161021 has 2 divisors, whose sum is σ = 12202020161022. Its totient is φ = 12202020161020.

The previous prime is 12202020161017. The next prime is 12202020161083. The reversal of 12202020161021 is 12016102020221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11954921692921 + 247098468100 = 3457589^2 + 497090^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202020161021 - 2² = 12202020161017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12202020160984 and 12202020161002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12202020160021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101010080510 + 6101010080511.

It is an arithmetic number, because the mean of its divisors is an integer number (6101010080511).

Almost surely, 2^{12202020161021} is an apocalyptic number.

It is an amenable number.

12202020161021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12202020161021 is an equidigital number, since it uses as much as digits as its factorization.

12202020161021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12202020161021 its reverse (12016102020221), we get a palindrome (24218122181242).

The spelling of 12202020161021 in words is "twelve trillion, two hundred two billion, twenty million, one hundred sixty-one thousand, twenty-one".