210102401 has 12 divisors (see below), whose sum is σ = 220414740. Its totient is φ = 200254560.

The previous prime is 210102397. The next prime is 210102413. The reversal of 210102401 is 104201012.

It can be written as a sum of positive squares in 2 ways, for example, as 84640000 + 125462401 = 9200^2 + 11201^2 .

It is not a de Polignac number, because 210102401 - 2² = 210102397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210102421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205271 + ... + 206291.

It is an arithmetic number, because the mean of its divisors is an integer number (18367895).

Almost surely, 2^210102401 is an apocalyptic number.

It is an amenable number.

210102401 is a deficient number, since it is larger than the sum of its proper divisors (10312339).

210102401 is a wasteful number, since it uses less digits than its factorization.

210102401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 210102401 is about 14494.9094857471. The cubic root of 210102401 is about 594.4887928391.

Adding to 210102401 its reverse (104201012), we get a palindrome (314303413).

The spelling of 210102401 in words is "two hundred ten million, one hundred two thousand, four hundred one".