212212031 has 4 divisors (see below), whose sum is σ = 212253192. Its totient is φ = 212170872.

The previous prime is 212211997. The next prime is 212212051. The reversal of 212212031 is 130212212.

It is a happy number.

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 212212031 - 2¹⁰ = 212211007 is a prime.

It is a super-2 number, since 2×212212031² = 90067892202289922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212211997 and 212212015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212051) 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, 11516 + ... + 23601.

It is an arithmetic number, because the mean of its divisors is an integer number (53063298).

Almost surely, 2^212212031 is an apocalyptic number.

212212031 is a deficient number, since it is larger than the sum of its proper divisors (41161).

212212031 is an equidigital number, since it uses as much as digits as its factorization.

212212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41160.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212212031 is about 14567.4991333447. The cubic root of 212212031 is about 596.4719163348.

Adding to 212212031 its reverse (130212212), we get a palindrome (342424243).

The spelling of 212212031 in words is "two hundred twelve million, two hundred twelve thousand, thirty-one".