212021113321 has 2 divisors, whose sum is σ = 212021113322. Its totient is φ = 212021113320.

The previous prime is 212021113301. The next prime is 212021113351. The reversal of 212021113321 is 123311120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145817823321 + 66203290000 = 381861^2 + 257300^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021113321 - 2⁷ = 212021113193 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021113301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010556660 + 106010556661.

It is an arithmetic number, because the mean of its divisors is an integer number (106010556661).

Almost surely, 2^212021113321 is an apocalyptic number.

It is an amenable number.

212021113321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021113321 is an equidigital number, since it uses as much as digits as its factorization.

212021113321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212021113321 its reverse (123311120212), we get a palindrome (335332233533).

The spelling of 212021113321 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, three hundred twenty-one".