121266601 has 2 divisors, whose sum is σ = 121266602. Its totient is φ = 121266600.

The previous prime is 121266589. The next prime is 121266611. The reversal of 121266601 is 106662121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104448400 + 16818201 = 10220^2 + 4101^2 .

It is an emirp because it is prime and its reverse (106662121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121266601 is a prime.

It is not a weakly prime, because it can be changed into another prime (121266611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60633300 + 60633301.

It is an arithmetic number, because the mean of its divisors is an integer number (60633301).

Almost surely, 2^121266601 is an apocalyptic number.

It is an amenable number.

121266601 is a deficient number, since it is larger than the sum of its proper divisors (1).

121266601 is an equidigital number, since it uses as much as digits as its factorization.

121266601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 121266601 is about 11012.1115595511. Note that the first 3 decimals coincide. The cubic root of 121266601 is about 494.9717373245.

The spelling of 121266601 in words is "one hundred twenty-one million, two hundred sixty-six thousand, six hundred one".