211111647852 has 96 divisors (see below), whose sum is σ = 565063446528. Its totient is φ = 60093025344.

The previous prime is 211111647809. The next prime is 211111647863. The reversal of 211111647852 is 258746111112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111647852.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46838583 + ... + 46843089.

It is an arithmetic number, because the mean of its divisors is an integer number (5886077568).

Almost surely, 2^211111647852 is an apocalyptic number.

It is an amenable number.

211111647852 is an abundant number, since it is smaller than the sum of its proper divisors (353951798676).

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

211111647852 is a wasteful number, since it uses less digits than its factorization.

211111647852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475 (or 6473 counting only the distinct ones).

The product of its digits is 26880, while the sum is 39.

Adding to 211111647852 its reverse (258746111112), we get a palindrome (469857758964).

The spelling of 211111647852 in words is "two hundred eleven billion, one hundred eleven million, six hundred forty-seven thousand, eight hundred fifty-two".