12170205101 has 2 divisors, whose sum is σ = 12170205102. Its totient is φ = 12170205100.

The previous prime is 12170205079. The next prime is 12170205137. The reversal of 12170205101 is 10150207121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10972353001 + 1197852100 = 104749^2 + 34610^2 .

It is a cyclic number.

It is not a de Polignac number, because 12170205101 - 2⁶ = 12170205037 is a prime.

It is a super-2 number, since 2×12170205101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12170205301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6085102550 + 6085102551.

It is an arithmetic number, because the mean of its divisors is an integer number (6085102551).

Almost surely, 2^12170205101 is an apocalyptic number.

It is an amenable number.

12170205101 is a deficient number, since it is larger than the sum of its proper divisors (1).

12170205101 is an equidigital number, since it uses as much as digits as its factorization.

12170205101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 20.

The spelling of 12170205101 in words is "twelve billion, one hundred seventy million, two hundred five thousand, one hundred one".