211131311212 has 12 divisors (see below), whose sum is σ = 371012907496. Its totient is φ = 105127623360.

The previous prime is 211131311201. The next prime is 211131311227. The reversal of 211131311212 is 212113131112.

It is a self number, because there is not a number n which added to its sum of digits gives 211131311212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109506978 + ... + 109508905.

Almost surely, 2^211131311212 is an apocalyptic number.

It is an amenable number.

211131311212 is a deficient number, since it is larger than the sum of its proper divisors (159881596284).

211131311212 is a wasteful number, since it uses less digits than its factorization.

211131311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219016128 (or 219016126 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

Adding to 211131311212 its reverse (212113131112), we get a palindrome (423244442324).

The spelling of 211131311212 in words is "two hundred eleven billion, one hundred thirty-one million, three hundred eleven thousand, two hundred twelve".