121211021212201 has 2 divisors, whose sum is σ = 121211021212202. Its totient is φ = 121211021212200.

The previous prime is 121211021212181. The next prime is 121211021212207. The reversal of 121211021212201 is 102212120112121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104392401907600 + 16818619304601 = 10217260^2 + 4101051^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211021212201 - 2²⁷ = 121210886994473 is a prime.

It is a super-2 number, since 2×121211021212201² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121211021212207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605510606100 + 60605510606101.

It is an arithmetic number, because the mean of its divisors is an integer number (60605510606101).

Almost surely, 2^{121211021212201} is an apocalyptic number.

It is an amenable number.

121211021212201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211021212201 is an equidigital number, since it uses as much as digits as its factorization.

121211021212201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121211021212201 its reverse (102212120112121), we get a palindrome (223423141324322).

The spelling of 121211021212201 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred one".