211554343212 has 24 divisors (see below), whose sum is σ = 509550246912. Its totient is φ = 68243336400.

The previous prime is 211554343211. The next prime is 211554343279. The reversal of 211554343212 is 212343455112.

It is not an unprimeable number, because it can be changed into a prime (211554343211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284346864 + ... + 284347607.

It is an arithmetic number, because the mean of its divisors is an integer number (21231260288).

Almost surely, 2^211554343212 is an apocalyptic number.

It is an amenable number.

211554343212 is an abundant number, since it is smaller than the sum of its proper divisors (297995903700).

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

211554343212 is a wasteful number, since it uses less digits than its factorization.

211554343212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568694509 (or 568694507 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

Adding to 211554343212 its reverse (212343455112), we get a palindrome (423897798324).

The spelling of 211554343212 in words is "two hundred eleven billion, five hundred fifty-four million, three hundred forty-three thousand, two hundred twelve".