212212401 has 16 divisors (see below), whose sum is σ = 296006400. Its totient is φ = 135056768.

The previous prime is 212212367. The next prime is 212212409. The reversal of 212212401 is 104212212.

It is a cyclic number.

It is not a de Polignac number, because 212212401 - 2⁹ = 212211889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212212409) 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 in 15 ways as a sum of consecutive naturals, for example, 5961 + ... + 21446.

It is an arithmetic number, because the mean of its divisors is an integer number (18500400).

Almost surely, 2^212212401 is an apocalyptic number.

It is an amenable number.

212212401 is a deficient number, since it is larger than the sum of its proper divisors (83793999).

212212401 is a wasteful number, since it uses less digits than its factorization.

212212401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27528.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212212401 is about 14567.5118328423. The cubic root of 212212401 is about 596.4722629920.

Adding to 212212401 its reverse (104212212), we get a palindrome (316424613).

The spelling of 212212401 in words is "two hundred twelve million, two hundred twelve thousand, four hundred one".