121783271 has 2 divisors, whose sum is σ = 121783272. Its totient is φ = 121783270.

The previous prime is 121783237. The next prime is 121783297. The reversal of 121783271 is 172387121.

It is a strong prime.

It is an emirp because it is prime and its reverse (172387121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121783271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121783171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60891635 + 60891636.

It is an arithmetic number, because the mean of its divisors is an integer number (60891636).

Almost surely, 2^121783271 is an apocalyptic number.

121783271 is a deficient number, since it is larger than the sum of its proper divisors (1).

121783271 is an equidigital number, since it uses as much as digits as its factorization.

121783271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 32.

The square root of 121783271 is about 11035.5457952926. The cubic root of 121783271 is about 495.6737022620.

The spelling of 121783271 in words is "one hundred twenty-one million, seven hundred eighty-three thousand, two hundred seventy-one".