211131121312 has 12 divisors (see below), whose sum is σ = 415664395146. Its totient is φ = 105565560640.

The previous prime is 211131121249. The next prime is 211131121337. The reversal of 211131121312 is 213121131112.

It can be written as a sum of positive squares in only one way, i.e., 186282012816 + 24849108496 = 431604^2 + 157636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211131121312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3298923739 + ... + 3298923802.

Almost surely, 2^211131121312 is an apocalyptic number.

It is an amenable number.

211131121312 is a deficient number, since it is larger than the sum of its proper divisors (204533273834).

211131121312 is an equidigital number, since it uses as much as digits as its factorization.

211131121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597847551 (or 6597847543 counting only the distinct ones).

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

Adding to 211131121312 its reverse (213121131112), we get a palindrome (424252252424).

The spelling of 211131121312 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred twenty-one thousand, three hundred twelve".