212223312312 has 48 divisors (see below), whose sum is σ = 583175638920. Its totient is φ = 64310093760.

The previous prime is 212223312307. The next prime is 212223312313. The reversal of 212223312312 is 213213322212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212223312313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36536923 + ... + 36542730.

Almost surely, 2^212223312312 is an apocalyptic number.

212223312312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212223312312 is an abundant number, since it is smaller than the sum of its proper divisors (370952326608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212223312312 is a wasteful number, since it uses less digits than its factorization.

212223312312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73079684 (or 73079669 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 212223312312 its reverse (213213322212), we get a palindrome (425436634524).

The spelling of 212223312312 in words is "two hundred twelve billion, two hundred twenty-three million, three hundred twelve thousand, three hundred twelve".