212103223231 has 4 divisors (see below), whose sum is σ = 212334022000. Its totient is φ = 211872424464.

The previous prime is 212103223223. The next prime is 212103223237. The reversal of 212103223231 is 132322301212.

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 212103223231 - 2³ = 212103223223 is a prime.

It is a super-2 number, since 2×212103223231² (a number of 23 digits) 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 (212103223237) 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, 115398006 + ... + 115399843.

It is an arithmetic number, because the mean of its divisors is an integer number (53083505500).

Almost surely, 2^212103223231 is an apocalyptic number.

212103223231 is a deficient number, since it is larger than the sum of its proper divisors (230798769).

212103223231 is an equidigital number, since it uses as much as digits as its factorization.

212103223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230798768.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212103223231 its reverse (132322301212), we get a palindrome (344425524443).

The spelling of 212103223231 in words is "two hundred twelve billion, one hundred three million, two hundred twenty-three thousand, two hundred thirty-one".