212211361 has 4 divisors (see below), whose sum is σ = 223380400. Its totient is φ = 201042324.

The previous prime is 212211343. The next prime is 212211371. The reversal of 212211361 is 163112212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212211361 - 2⁹ = 212210849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11169019 = 212211361 / (2 + 1 + 2 + 2 + 1 + 1 + 3 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212211331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5584491 + ... + 5584528.

It is an arithmetic number, because the mean of its divisors is an integer number (55845100).

Almost surely, 2^212211361 is an apocalyptic number.

It is an amenable number.

212211361 is a deficient number, since it is larger than the sum of its proper divisors (11169039).

212211361 is a wasteful number, since it uses less digits than its factorization.

212211361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169038.

The product of its digits is 144, while the sum is 19.

The square root of 212211361 is about 14567.4761369291. The cubic root of 212211361 is about 596.4712886032.

Adding to 212211361 its reverse (163112212), we get a palindrome (375323573).

The spelling of 212211361 in words is "two hundred twelve million, two hundred eleven thousand, three hundred sixty-one".