311100212 has 12 divisors (see below), whose sum is σ = 550543140. Its totient is φ = 153802176.

The previous prime is 311100199. The next prime is 311100239. The reversal of 311100212 is 212001113.

It can be written as a sum of positive squares in 2 ways, for example, as 211818916 + 99281296 = 14554^2 + 9964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311100193 and 311100202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436583 + ... + 437294.

It is an arithmetic number, because the mean of its divisors is an integer number (45878595).

Almost surely, 2^311100212 is an apocalyptic number.

It is an amenable number.

311100212 is a deficient number, since it is larger than the sum of its proper divisors (239442928).

311100212 is a wasteful number, since it uses less digits than its factorization.

311100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873970 (or 873968 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 311100212 is about 17638.0331102989. The cubic root of 311100212 is about 677.5896583912.

Adding to 311100212 its reverse (212001113), we get a palindrome (523101325).

Subtracting from 311100212 its reverse (212001113), we obtain a palindrome (99099099).

The spelling of 311100212 in words is "three hundred eleven million, one hundred thousand, two hundred twelve".