121616611 has 2 divisors, whose sum is σ = 121616612. Its totient is φ = 121616610.

The previous prime is 121616603. The next prime is 121616639. The reversal of 121616611 is 116616121.

It is a weak prime.

It is an emirp because it is prime and its reverse (116616121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121616611 - 2³ = 121616603 is a prime.

It is a super-2 number, since 2×121616611² = 29581200142250642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121617611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60808305 + 60808306.

It is an arithmetic number, because the mean of its divisors is an integer number (60808306).

Almost surely, 2^121616611 is an apocalyptic number.

121616611 is a deficient number, since it is larger than the sum of its proper divisors (1).

121616611 is an equidigital number, since it uses as much as digits as its factorization.

121616611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 25.

The square root of 121616611 is about 11027.9921563266. The cubic root of 121616611 is about 495.4474897711.

The spelling of 121616611 in words is "one hundred twenty-one million, six hundred sixteen thousand, six hundred eleven".