212090102117281 has 2 divisors, whose sum is σ = 212090102117282. Its totient is φ = 212090102117280.

The previous prime is 212090102117251. The next prime is 212090102117291. The reversal of 212090102117281 is 182711201090212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162964245405025 + 49125856712256 = 12765745^2 + 7008984^2 .

It is a cyclic number.

It is not a de Polignac number, because 212090102117281 - 2¹⁷ = 212090101986209 is a prime.

It is a super-2 number, since 2×212090102117281² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212090102117281.

It is not a weakly prime, because it can be changed into another prime (212090102117251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106045051058640 + 106045051058641.

It is an arithmetic number, because the mean of its divisors is an integer number (106045051058641).

Almost surely, 2^{212090102117281} is an apocalyptic number.

It is an amenable number.

212090102117281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212090102117281 is an equidigital number, since it uses as much as digits as its factorization.

212090102117281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 212090102117281 in words is "two hundred twelve trillion, ninety billion, one hundred two million, one hundred seventeen thousand, two hundred eighty-one".