210151121 has 2 divisors, whose sum is σ = 210151122. Its totient is φ = 210151120.

The previous prime is 210151111. The next prime is 210151141. The reversal of 210151121 is 121151012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169650625 + 40500496 = 13025^2 + 6364^2 .

It is a cyclic number.

It is not a de Polignac number, because 210151121 - 2²⁶ = 143042257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210151096 and 210151105.

It is not a weakly prime, because it can be changed into another prime (210151111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105075560 + 105075561.

It is an arithmetic number, because the mean of its divisors is an integer number (105075561).

Almost surely, 2^210151121 is an apocalyptic number.

It is an amenable number.

210151121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210151121 is an equidigital number, since it uses as much as digits as its factorization.

210151121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 210151121 is about 14496.5899783363. The cubic root of 210151121 is about 594.5347406807.

The spelling of 210151121 in words is "two hundred ten million, one hundred fifty-one thousand, one hundred twenty-one".