212442011281 has 2 divisors, whose sum is σ = 212442011282. Its totient is φ = 212442011280.

The previous prime is 212442011279. The next prime is 212442011359. The reversal of 212442011281 is 182110244212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211637721681 + 804289600 = 460041^2 + 28360^2 .

It is a cyclic number.

It is not a de Polignac number, because 212442011281 - 2¹ = 212442011279 is a prime.

It is a super-2 number, since 2×212442011281² (a number of 23 digits) contains 22 as substring.

Together with 212442011279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212442011381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106221005640 + 106221005641.

It is an arithmetic number, because the mean of its divisors is an integer number (106221005641).

Almost surely, 2^212442011281 is an apocalyptic number.

It is an amenable number.

212442011281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212442011281 is an equidigital number, since it uses as much as digits as its factorization.

212442011281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 28.

Adding to 212442011281 its reverse (182110244212), we get a palindrome (394552255493).

The spelling of 212442011281 in words is "two hundred twelve billion, four hundred forty-two million, eleven thousand, two hundred eighty-one".