121762217 has 2 divisors, whose sum is σ = 121762218. Its totient is φ = 121762216.

The previous prime is 121762189. The next prime is 121762219. The reversal of 121762217 is 712267121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113124496 + 8637721 = 10636^2 + 2939^2 .

It is a cyclic number.

It is not a de Polignac number, because 121762217 - 2¹⁶ = 121696681 is a prime.

Together with 121762219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121762217.

It is not a weakly prime, because it can be changed into another prime (121762219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60881108 + 60881109.

It is an arithmetic number, because the mean of its divisors is an integer number (60881109).

Almost surely, 2^121762217 is an apocalyptic number.

It is an amenable number.

121762217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121762217 is an equidigital number, since it uses as much as digits as its factorization.

121762217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 29.

The square root of 121762217 is about 11034.5918365837. The cubic root of 121762217 is about 495.6451364459.

The spelling of 121762217 in words is "one hundred twenty-one million, seven hundred sixty-two thousand, two hundred seventeen".