207126121 has 2 divisors, whose sum is σ = 207126122. Its totient is φ = 207126120.

The previous prime is 207126107. The next prime is 207126131. The reversal of 207126121 is 121621702.

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., 193905625 + 13220496 = 13925^2 + 3636^2 .

It is a cyclic number.

It is not a de Polignac number, because 207126121 - 2⁷ = 207125993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 207126092 and 207126101.

It is not a weakly prime, because it can be changed into another prime (207126131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103563060 + 103563061.

It is an arithmetic number, because the mean of its divisors is an integer number (103563061).

Almost surely, 2^207126121 is an apocalyptic number.

It is an amenable number.

207126121 is a deficient number, since it is larger than the sum of its proper divisors (1).

207126121 is an equidigital number, since it uses as much as digits as its factorization.

207126121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 207126121 is about 14391.8769102574. The cubic root of 207126121 is about 591.6682851066.

Adding to 207126121 its reverse (121621702), we get a palindrome (328747823).

The spelling of 207126121 in words is "two hundred seven million, one hundred twenty-six thousand, one hundred twenty-one".