121222100171 has 2 divisors, whose sum is σ = 121222100172. Its totient is φ = 121222100170.

The previous prime is 121222100147. The next prime is 121222100183. The reversal of 121222100171 is 171001222121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (171001222121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121222100171 - 2¹⁸ = 121221838027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121222100191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611050085 + 60611050086.

It is an arithmetic number, because the mean of its divisors is an integer number (60611050086).

Almost surely, 2^121222100171 is an apocalyptic number.

121222100171 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222100171 is an equidigital number, since it uses as much as digits as its factorization.

121222100171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 121222100171 its reverse (171001222121), we get a palindrome (292223322292).

The spelling of 121222100171 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, one hundred seventy-one".