311213012212 has 24 divisors (see below), whose sum is σ = 553550227776. Its totient is φ = 153071898048.

The previous prime is 311213012171. The next prime is 311213012221. The reversal of 311213012212 is 212210312113.

It is a super-2 number, since 2×311213012212² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311213012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934208 + ... + 2088919.

It is an arithmetic number, because the mean of its divisors is an integer number (23064592824).

Almost surely, 2^311213012212 is an apocalyptic number.

It is an amenable number.

311213012212 is a deficient number, since it is larger than the sum of its proper divisors (242337215564).

311213012212 is a wasteful number, since it uses less digits than its factorization.

311213012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023447 (or 4023445 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 311213012212 its reverse (212210312113), we get a palindrome (523423324325).

The spelling of 311213012212 in words is "three hundred eleven billion, two hundred thirteen million, twelve thousand, two hundred twelve".