212103231 has 4 divisors (see below), whose sum is σ = 282804312. Its totient is φ = 141402152.

The previous prime is 212103223. The next prime is 212103233. The reversal of 212103231 is 132301212.

212103231 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 212103231 - 2³ = 212103223 is a prime.

It is a super-2 number, since 2×212103231² = 89975561201278722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212103231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212103233) 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, 35350536 + ... + 35350541.

It is an arithmetic number, because the mean of its divisors is an integer number (70701078).

Almost surely, 2^212103231 is an apocalyptic number.

212103231 is a deficient number, since it is larger than the sum of its proper divisors (70701081).

212103231 is an equidigital number, since it uses as much as digits as its factorization.

212103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70701080.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212103231 is about 14563.7643142149. The cubic root of 212103231 is about 596.3699628970.

Adding to 212103231 its reverse (132301212), we get a palindrome (344404443).

The spelling of 212103231 in words is "two hundred twelve million, one hundred three thousand, two hundred thirty-one".