212222101231 has 4 divisors (see below), whose sum is σ = 242539544272. Its totient is φ = 181904658192.

The previous prime is 212222101213. The next prime is 212222101241. The reversal of 212222101231 is 132101222212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212222101231 is a prime.

It is a super-2 number, since 2×212222101231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212222101199 and 212222101208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222101211) 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, 15158721510 + ... + 15158721523.

It is an arithmetic number, because the mean of its divisors is an integer number (60634886068).

Almost surely, 2^212222101231 is an apocalyptic number.

212222101231 is a deficient number, since it is larger than the sum of its proper divisors (30317443041).

212222101231 is an equidigital number, since it uses as much as digits as its factorization.

212222101231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30317443040.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212222101231 its reverse (132101222212), we get a palindrome (344323323443).

The spelling of 212222101231 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred one thousand, two hundred thirty-one".