212320323202021 has 2 divisors, whose sum is σ = 212320323202022. Its totient is φ = 212320323202020.

The previous prime is 212320323202007. The next prime is 212320323202073. The reversal of 212320323202021 is 120202323023212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175082807116996 + 37237516085025 = 13231886^2 + 6102255^2 .

It is a cyclic number.

It is not a de Polignac number, because 212320323202021 - 2²⁹ = 212319786331109 is a prime.

It is a super-2 number, since 2×212320323202021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212320323202121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160161601010 + 106160161601011.

It is an arithmetic number, because the mean of its divisors is an integer number (106160161601011).

Almost surely, 2^{212320323202021} is an apocalyptic number.

It is an amenable number.

212320323202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320323202021 is an equidigital number, since it uses as much as digits as its factorization.

212320323202021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 212320323202021 its reverse (120202323023212), we get a palindrome (332522646225233).

The spelling of 212320323202021 in words is "two hundred twelve trillion, three hundred twenty billion, three hundred twenty-three million, two hundred two thousand, twenty-one".