211612511012 has 12 divisors (see below), whose sum is σ = 423225022080. Its totient is φ = 90691076136.

The previous prime is 211612511009. The next prime is 211612511027. The reversal of 211612511012 is 210115216112.

It is a happy number.

211612511012 is an admirable number.

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, 3778794812 + ... + 3778794867.

It is an arithmetic number, because the mean of its divisors is an integer number (35268751840).

Almost surely, 2^211612511012 is an apocalyptic number.

It is an amenable number.

211612511012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211612511012 is a wasteful number, since it uses less digits than its factorization.

211612511012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557589690 (or 7557589688 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 23.

Adding to 211612511012 its reverse (210115216112), we get a palindrome (421727727124).

The spelling of 211612511012 in words is "two hundred eleven billion, six hundred twelve million, five hundred eleven thousand, twelve".