212223111131 has 4 divisors (see below), whose sum is σ = 212230989264. Its totient is φ = 212215233000.

The previous prime is 212223111059. The next prime is 212223111173. The reversal of 212223111131 is 131111322212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212223111131 - 2¹⁰ = 212223110107 is a prime.

It is a super-2 number, since 2×212223111131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212223111631) 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, 3898520 + ... + 3952581.

It is an arithmetic number, because the mean of its divisors is an integer number (53057747316).

Almost surely, 2^212223111131 is an apocalyptic number.

212223111131 is a deficient number, since it is larger than the sum of its proper divisors (7878133).

212223111131 is an equidigital number, since it uses as much as digits as its factorization.

212223111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7878132.

The product of its digits is 144, while the sum is 20.

Adding to 212223111131 its reverse (131111322212), we get a palindrome (343334433343).

The spelling of 212223111131 in words is "two hundred twelve billion, two hundred twenty-three million, one hundred eleven thousand, one hundred thirty-one".