212320321121 has 2 divisors, whose sum is σ = 212320321122. Its totient is φ = 212320321120.

The previous prime is 212320321099. The next prime is 212320321159. The reversal of 212320321121 is 121123023212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179301433600 + 33018887521 = 423440^2 + 181711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212320321121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212320321093 and 212320321102.

It is not a weakly prime, because it can be changed into another prime (212320321921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160160560 + 106160160561.

It is an arithmetic number, because the mean of its divisors is an integer number (106160160561).

Almost surely, 2^212320321121 is an apocalyptic number.

It is an amenable number.

212320321121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320321121 is an equidigital number, since it uses as much as digits as its factorization.

212320321121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212320321121 its reverse (121123023212), we get a palindrome (333443344333).

The spelling of 212320321121 in words is "two hundred twelve billion, three hundred twenty million, three hundred twenty-one thousand, one hundred twenty-one".