121001020171 has 2 divisors, whose sum is σ = 121001020172. Its totient is φ = 121001020170.

The previous prime is 121001020111. The next prime is 121001020181. The reversal of 121001020171 is 171020100121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001020171 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001020111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500510085 + 60500510086.

It is an arithmetic number, because the mean of its divisors is an integer number (60500510086).

Almost surely, 2^121001020171 is an apocalyptic number.

121001020171 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001020171 is an equidigital number, since it uses as much as digits as its factorization.

121001020171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 121001020171 its reverse (171020100121), we get a palindrome (292021120292).

The spelling of 121001020171 in words is "one hundred twenty-one billion, one million, twenty thousand, one hundred seventy-one".