311323202212312 has 8 divisors (see below), whose sum is σ = 583731004148100. Its totient is φ = 155661601106152.

The previous prime is 311323202212301. The next prime is 311323202212313. The reversal of 311323202212312 is 213212202323113.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×311323202212312² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311323202212313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19457700138262 + ... + 19457700138277.

Almost surely, 2^{311323202212312} is an apocalyptic number.

It is an amenable number.

311323202212312 is a deficient number, since it is larger than the sum of its proper divisors (272407801935788).

311323202212312 is a wasteful number, since it uses less digits than its factorization.

311323202212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38915400276545 (or 38915400276541 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 311323202212312 its reverse (213212202323113), we get a palindrome (524535404535425).

The spelling of 311323202212312 in words is "three hundred eleven trillion, three hundred twenty-three billion, two hundred two million, two hundred twelve thousand, three hundred twelve".