210121000120873 has 2 divisors, whose sum is σ = 210121000120874. Its totient is φ = 210121000120872.

The previous prime is 210121000120849. The next prime is 210121000121041. The reversal of 210121000120873 is 378021000121012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182931116191209 + 27189883929664 = 13525203^2 + 5214392^2 .

It is a cyclic number.

It is not a de Polignac number, because 210121000120873 - 2³³ = 210112410186281 is a prime.

It is a super-2 number, since 2×210121000120873² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210121000120373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060500060436 + 105060500060437.

It is an arithmetic number, because the mean of its divisors is an integer number (105060500060437).

Almost surely, 2^{210121000120873} is an apocalyptic number.

It is an amenable number.

210121000120873 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121000120873 is an equidigital number, since it uses as much as digits as its factorization.

210121000120873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

Adding to 210121000120873 its reverse (378021000121012), we get a palindrome (588142000241885).

The spelling of 210121000120873 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twenty thousand, eight hundred seventy-three".