121126217 has 2 divisors, whose sum is σ = 121126218. Its totient is φ = 121126216.

The previous prime is 121126193. The next prime is 121126231. The reversal of 121126217 is 712621121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119006281 + 2119936 = 10909^2 + 1456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121126217 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121126192 and 121126201.

It is not a weakly prime, because it can be changed into another prime (121126237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60563108 + 60563109.

It is an arithmetic number, because the mean of its divisors is an integer number (60563109).

Almost surely, 2^121126217 is an apocalyptic number.

It is an amenable number.

121126217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121126217 is an equidigital number, since it uses as much as digits as its factorization.

121126217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 121126217 is about 11005.7356410192. The cubic root of 121126217 is about 494.7806626111.

Adding to 121126217 its reverse (712621121), we get a palindrome (833747338).

The spelling of 121126217 in words is "one hundred twenty-one million, one hundred twenty-six thousand, two hundred seventeen".