121301100212261 has 2 divisors, whose sum is σ = 121301100212262. Its totient is φ = 121301100212260.

The previous prime is 121301100212233. The next prime is 121301100212293. The reversal of 121301100212261 is 162212001103121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113226943864225 + 8074156348036 = 10640815^2 + 2841506^2 .

It is a cyclic number.

It is not a de Polignac number, because 121301100212261 - 2⁶ = 121301100212197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121301100215261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60650550106130 + 60650550106131.

It is an arithmetic number, because the mean of its divisors is an integer number (60650550106131).

Almost surely, 2^{121301100212261} is an apocalyptic number.

It is an amenable number.

121301100212261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121301100212261 is an equidigital number, since it uses as much as digits as its factorization.

121301100212261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 121301100212261 its reverse (162212001103121), we get a palindrome (283513101315382).

The spelling of 121301100212261 in words is "one hundred twenty-one trillion, three hundred one billion, one hundred million, two hundred twelve thousand, two hundred sixty-one".