12120001 has 2 divisors, whose sum is σ = 12120002. Its totient is φ = 12120000.

The previous prime is 12119993. The next prime is 12120019. The reversal of 12120001 is 10002121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11730625 + 389376 = 3425^2 + 624^2 .

It is an emirp because it is prime and its reverse (10002121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12120001 - 2³ = 12119993 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060000 + 6060001.

It is an arithmetic number, because the mean of its divisors is an integer number (6060001).

Almost surely, 2^12120001 is an apocalyptic number.

It is an amenable number.

12120001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120001 is an equidigital number, since it uses as much as digits as its factorization.

12120001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12120001 is about 3481.3791807271. The cubic root of 12120001 is about 229.7034678858.

Adding to 12120001 its reverse (10002121), we get a palindrome (22122122).

The spelling of 12120001 in words is "twelve million, one hundred twenty thousand, one".