121100212252121 has 2 divisors, whose sum is σ = 121100212252122. Its totient is φ = 121100212252120.

The previous prime is 121100212252099. The next prime is 121100212252127. The reversal of 121100212252121 is 121252212001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111686428512400 + 9413783739721 = 10568180^2 + 3068189^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100212252121 - 2¹⁰ = 121100212251097 is a prime.

It is a super-2 number, since 2×121100212252121² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121100212252127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550106126060 + 60550106126061.

It is an arithmetic number, because the mean of its divisors is an integer number (60550106126061).

Almost surely, 2^{121100212252121} is an apocalyptic number.

It is an amenable number.

121100212252121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100212252121 is an equidigital number, since it uses as much as digits as its factorization.

121100212252121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 23.

Adding to 121100212252121 its reverse (121252212001121), we get a palindrome (242352424253242).

The spelling of 121100212252121 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, two hundred fifty-two thousand, one hundred twenty-one".