210047121 has 32 divisors (see below), whose sum is σ = 330549120. Its totient is φ = 131369472.

The previous prime is 210047107. The next prime is 210047129. The reversal of 210047121 is 121740012.

It is a de Polignac number, because none of the positive numbers 2^k-210047121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210047094 and 210047103.

It is not an unprimeable number, because it can be changed into a prime (210047129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202821 + ... + 203853.

It is an arithmetic number, because the mean of its divisors is an integer number (10329660).

Almost surely, 2^210047121 is an apocalyptic number.

It is an amenable number.

210047121 is a deficient number, since it is larger than the sum of its proper divisors (120501999).

210047121 is a wasteful number, since it uses less digits than its factorization.

210047121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 210047121 is about 14493.0024839576. The cubic root of 210047121 is about 594.4366496573.

Adding to 210047121 its reverse (121740012), we get a palindrome (331787133).

The spelling of 210047121 in words is "two hundred ten million, forty-seven thousand, one hundred twenty-one".