212331201123 has 4 divisors (see below), whose sum is σ = 283108268168. Its totient is φ = 141554134080.

The previous prime is 212331201109. The next prime is 212331201127. The reversal of 212331201123 is 321102133212.

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

It is not a de Polignac number, because 212331201123 - 2²¹ = 212329103971 is a prime.

It is a super-2 number, since 2×212331201123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212331201123.

It is not an unprimeable number, because it can be changed into a prime (212331201127) 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, 35388533518 + ... + 35388533523.

It is an arithmetic number, because the mean of its divisors is an integer number (70777067042).

Almost surely, 2^212331201123 is an apocalyptic number.

212331201123 is a deficient number, since it is larger than the sum of its proper divisors (70777067045).

212331201123 is an equidigital number, since it uses as much as digits as its factorization.

212331201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70777067044.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212331201123 its reverse (321102133212), we get a palindrome (533433334335).

The spelling of 212331201123 in words is "two hundred twelve billion, three hundred thirty-one million, two hundred one thousand, one hundred twenty-three".