210120112012081 has 2 divisors, whose sum is σ = 210120112012082. Its totient is φ = 210120112012080.

The previous prime is 210120112012033. The next prime is 210120112012087. The reversal of 210120112012081 is 180210211021012.

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., 207133837701025 + 2986274311056 = 14392145^2 + 1728084^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120112012081 - 2¹³ = 210120112003889 is a prime.

It is a super-2 number, since 2×210120112012081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210120112012087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060056006040 + 105060056006041.

It is an arithmetic number, because the mean of its divisors is an integer number (105060056006041).

Almost surely, 2^{210120112012081} is an apocalyptic number.

It is an amenable number.

210120112012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120112012081 is an equidigital number, since it uses as much as digits as its factorization.

210120112012081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 210120112012081 its reverse (180210211021012), we get a palindrome (390330323033093).

The spelling of 210120112012081 in words is "two hundred ten trillion, one hundred twenty billion, one hundred twelve million, twelve thousand, eighty-one".