102121273 has 2 divisors, whose sum is σ = 102121274. Its totient is φ = 102121272.

The previous prime is 102121247. The next prime is 102121303. The reversal of 102121273 is 372121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72386064 + 29735209 = 8508^2 + 5453^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121273 - 2⁹ = 102120761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102121273.

It is not a weakly prime, because it can be changed into another prime (102121213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060636 + 51060637.

It is an arithmetic number, because the mean of its divisors is an integer number (51060637).

Almost surely, 2^102121273 is an apocalyptic number.

It is an amenable number.

102121273 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121273 is an equidigital number, since it uses as much as digits as its factorization.

102121273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 102121273 is about 10105.5070629830. The cubic root of 102121273 is about 467.4179718244.

Adding to 102121273 its reverse (372121201), we get a palindrome (474242474).

The spelling of 102121273 in words is "one hundred two million, one hundred twenty-one thousand, two hundred seventy-three".