211481812812 has 48 divisors (see below), whose sum is σ = 525812484960. Its totient is φ = 65924631552.

The previous prime is 211481812811. The next prime is 211481812831. The reversal of 211481812812 is 218218184112.

It is not an unprimeable number, because it can be changed into a prime (211481812811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3269487 + ... + 3333542.

It is an arithmetic number, because the mean of its divisors is an integer number (10954426770).

Almost surely, 2^211481812812 is an apocalyptic number.

It is an amenable number.

211481812812 is an abundant number, since it is smaller than the sum of its proper divisors (314330672148).

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

211481812812 is a wasteful number, since it uses less digits than its factorization.

211481812812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603210 (or 6603208 counting only the distinct ones).

The product of its digits is 16384, while the sum is 39.

Adding to 211481812812 its reverse (218218184112), we get a palindrome (429699996924).

The spelling of 211481812812 in words is "two hundred eleven billion, four hundred eighty-one million, eight hundred twelve thousand, eight hundred twelve".