211731624212 has 12 divisors (see below), whose sum is σ = 371330627136. Its totient is φ = 105637159320.

The previous prime is 211731624187. The next prime is 211731624217. The reversal of 211731624212 is 212426137112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211731624217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57161114 + ... + 57164817.

It is an arithmetic number, because the mean of its divisors is an integer number (30944218928).

Almost surely, 2^211731624212 is an apocalyptic number.

It is an amenable number.

211731624212 is a deficient number, since it is larger than the sum of its proper divisors (159599002924).

211731624212 is a wasteful number, since it uses less digits than its factorization.

211731624212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114326398 (or 114326396 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The spelling of 211731624212 in words is "two hundred eleven billion, seven hundred thirty-one million, six hundred twenty-four thousand, two hundred twelve".