121266641 has 2 divisors, whose sum is σ = 121266642. Its totient is φ = 121266640.

The previous prime is 121266623. The next prime is 121266647. The reversal of 121266641 is 146662121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93219025 + 28047616 = 9655^2 + 5296^2 .

It is a cyclic number.

It is not a de Polignac number, because 121266641 - 2⁶ = 121266577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121266647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60633320 + 60633321.

It is an arithmetic number, because the mean of its divisors is an integer number (60633321).

Almost surely, 2^121266641 is an apocalyptic number.

It is an amenable number.

121266641 is a deficient number, since it is larger than the sum of its proper divisors (1).

121266641 is an equidigital number, since it uses as much as digits as its factorization.

121266641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 121266641 is about 11012.1133757331. The cubic root of 121266641 is about 494.9717917470.

The spelling of 121266641 in words is "one hundred twenty-one million, two hundred sixty-six thousand, six hundred forty-one".