212211031 has 4 divisors (see below), whose sum is σ = 213882112. Its totient is φ = 210539952.

The previous prime is 212211029. The next prime is 212211053. The reversal of 212211031 is 130112212.

212211031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212211031 - 2¹ = 212211029 is a prime.

It is a super-2 number, since 2×212211031² = 90067043356165922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211001) 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, 835350 + ... + 835603.

It is an arithmetic number, because the mean of its divisors is an integer number (53470528).

Almost surely, 2^212211031 is an apocalyptic number.

212211031 is a deficient number, since it is larger than the sum of its proper divisors (1671081).

212211031 is a wasteful number, since it uses less digits than its factorization.

212211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671080.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 212211031 is about 14567.4648103230. The cubic root of 212211031 is about 596.4709794214.

Adding to 212211031 its reverse (130112212), we get a palindrome (342323243).

The spelling of 212211031 in words is "two hundred twelve million, two hundred eleven thousand, thirty-one".