212102401 has 8 divisors (see below), whose sum is σ = 242633664. Its totient is φ = 181628880.

The previous prime is 212102393. The next prime is 212102417. The reversal of 212102401 is 104201212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212102401 - 2³ = 212102393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212102801) 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 7 ways as a sum of consecutive naturals, for example, 6250 + ... + 21523.

It is an arithmetic number, because the mean of its divisors is an integer number (30329208).

Almost surely, 2^212102401 is an apocalyptic number.

It is an amenable number.

212102401 is a deficient number, since it is larger than the sum of its proper divisors (30531263).

212102401 is a wasteful number, since it uses less digits than its factorization.

212102401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28871.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212102401 is about 14563.7358188069. The cubic root of 212102401 is about 596.3691849932.

Adding to 212102401 its reverse (104201212), we get a palindrome (316303613).

The spelling of 212102401 in words is "two hundred twelve million, one hundred two thousand, four hundred one".