212001021112169 has 2 divisors, whose sum is σ = 212001021112170. Its totient is φ = 212001021112168.

The previous prime is 212001021112103. The next prime is 212001021112193. The reversal of 212001021112169 is 961211120100212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115387062134569 + 96613958977600 = 10741837^2 + 9829240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212001021112169 is a prime.

It is a super-2 number, since 2×212001021112169² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212001021312169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000510556084 + 106000510556085.

It is an arithmetic number, because the mean of its divisors is an integer number (106000510556085).

Almost surely, 2^{212001021112169} is an apocalyptic number.

It is an amenable number.

212001021112169 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001021112169 is an equidigital number, since it uses as much as digits as its factorization.

212001021112169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 212001021112169 in words is "two hundred twelve trillion, one billion, twenty-one million, one hundred twelve thousand, one hundred sixty-nine".