121217711 has 2 divisors, whose sum is σ = 121217712. Its totient is φ = 121217710.

The previous prime is 121217669. The next prime is 121217749. The reversal of 121217711 is 117712121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121217711 - 2¹⁰ = 121216687 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121217791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60608855 + 60608856.

It is an arithmetic number, because the mean of its divisors is an integer number (60608856).

Almost surely, 2^121217711 is an apocalyptic number.

121217711 is a deficient number, since it is larger than the sum of its proper divisors (1).

121217711 is an equidigital number, since it uses as much as digits as its factorization.

121217711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196, while the sum is 23.

The square root of 121217711 is about 11009.8915071857. The cubic root of 121217711 is about 494.9052105677.

Adding to 121217711 its reverse (117712121), we get a palindrome (238929832).

The spelling of 121217711 in words is "one hundred twenty-one million, two hundred seventeen thousand, seven hundred eleven".