12121001011201 has 2 divisors, whose sum is σ = 12121001011202. Its totient is φ = 12121001011200.

The previous prime is 12121001011199. The next prime is 12121001011247. The reversal of 12121001011201 is 10211010012121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7812159160576 + 4308841850625 = 2795024^2 + 2075775^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121001011201 - 2¹ = 12121001011199 is a prime.

Together with 12121001011199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12121001011291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060500505600 + 6060500505601.

It is an arithmetic number, because the mean of its divisors is an integer number (6060500505601).

Almost surely, 2^{12121001011201} is an apocalyptic number.

It is an amenable number.

12121001011201 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121001011201 is an equidigital number, since it uses as much as digits as its factorization.

12121001011201 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 13.

Adding to 12121001011201 its reverse (10211010012121), we get a palindrome (22332011023322).

The spelling of 12121001011201 in words is "twelve trillion, one hundred twenty-one billion, one million, eleven thousand, two hundred one".