212176417261 has 2 divisors, whose sum is σ = 212176417262. Its totient is φ = 212176417260.

The previous prime is 212176417183. The next prime is 212176417319. The reversal of 212176417261 is 162714671212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211582520361 + 593896900 = 459981^2 + 24370^2 .

It is a cyclic number.

It is not a de Polignac number, because 212176417261 - 2²⁷ = 212042199533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212176415261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106088208630 + 106088208631.

It is an arithmetic number, because the mean of its divisors is an integer number (106088208631).

Almost surely, 2^212176417261 is an apocalyptic number.

It is an amenable number.

212176417261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212176417261 is an equidigital number, since it uses as much as digits as its factorization.

212176417261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The spelling of 212176417261 in words is "two hundred twelve billion, one hundred seventy-six million, four hundred seventeen thousand, two hundred sixty-one".