212632079209909 has 2 divisors, whose sum is σ = 212632079209910. Its totient is φ = 212632079209908.

The previous prime is 212632079209841. The next prime is 212632079209969. The reversal of 212632079209909 is 909902970236212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211548210821809 + 1083868388100 = 14544697^2 + 1041090^2 .

It is a cyclic number.

It is not a de Polignac number, because 212632079209909 - 2¹¹ = 212632079207861 is a prime.

It is a super-2 number, since 2×212632079209909² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212632079209969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106316039604954 + 106316039604955.

It is an arithmetic number, because the mean of its divisors is an integer number (106316039604955).

Almost surely, 2^{212632079209909} is an apocalyptic number.

It is an amenable number.

212632079209909 is a deficient number, since it is larger than the sum of its proper divisors (1).

212632079209909 is an equidigital number, since it uses as much as digits as its factorization.

212632079209909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 212632079209909 in words is "two hundred twelve trillion, six hundred thirty-two billion, seventy-nine million, two hundred nine thousand, nine hundred nine".