2175061221197 has 2 divisors, whose sum is σ = 2175061221198. Its totient is φ = 2175061221196.

The previous prime is 2175061221173. The next prime is 2175061221199. The reversal of 2175061221197 is 7911221605712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1986693069001 + 188368152196 = 1409501^2 + 434014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2175061221197 - 2¹² = 2175061217101 is a prime.

It is a super-2 number, since 2×2175061221197² (a number of 25 digits) contains 22 as substring.

Together with 2175061221199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2175061221199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1087530610598 + 1087530610599.

It is an arithmetic number, because the mean of its divisors is an integer number (1087530610599).

Almost surely, 2^{2175061221197} is an apocalyptic number.

It is an amenable number.

2175061221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2175061221197 is an equidigital number, since it uses as much as digits as its factorization.

2175061221197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 44.

The spelling of 2175061221197 in words is "two trillion, one hundred seventy-five billion, sixty-one million, two hundred twenty-one thousand, one hundred ninety-seven".