212311222133 has 4 divisors (see below), whose sum is σ = 212387349420. Its totient is φ = 212235094848.

The previous prime is 212311222129. The next prime is 212311222141. The reversal of 212311222133 is 331222113212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68705845924 + 143605376209 = 262118^2 + 378953^2 .

It is a cyclic number.

It is not a de Polignac number, because 212311222133 - 2² = 212311222129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212311222099 and 212311222108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212311222733) 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, 38059460 + ... + 38065037.

It is an arithmetic number, because the mean of its divisors is an integer number (53096837355).

Almost surely, 2^212311222133 is an apocalyptic number.

It is an amenable number.

212311222133 is a deficient number, since it is larger than the sum of its proper divisors (76127287).

212311222133 is an equidigital number, since it uses as much as digits as its factorization.

212311222133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76127286.

The product of its digits is 864, while the sum is 23.

Adding to 212311222133 its reverse (331222113212), we get a palindrome (543533335345).

The spelling of 212311222133 in words is "two hundred twelve billion, three hundred eleven million, two hundred twenty-two thousand, one hundred thirty-three".