12120210001 has 2 divisors, whose sum is σ = 12120210002. Its totient is φ = 12120210000.

The previous prime is 12120209999. The next prime is 12120210059. The reversal of 12120210001 is 10001202121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11252966400 + 867243601 = 106080^2 + 29449^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120210001 - 2¹ = 12120209999 is a prime.

Together with 12120209999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12120210001.

It is not a weakly prime, because it can be changed into another prime (12120210601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060105000 + 6060105001.

It is an arithmetic number, because the mean of its divisors is an integer number (6060105001).

Almost surely, 2^12120210001 is an apocalyptic number.

It is an amenable number.

12120210001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120210001 is an equidigital number, since it uses as much as digits as its factorization.

12120210001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12120210001 its reverse (10001202121), we get a palindrome (22121412122).

The spelling of 12120210001 in words is "twelve billion, one hundred twenty million, two hundred ten thousand, one".