211233531212 has 48 divisors (see below), whose sum is σ = 427209243552. Its totient is φ = 90319918080.

The previous prime is 211233531203. The next prime is 211233531233. The reversal of 211233531212 is 212135332112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372838 + ... + 1518930.

It is an arithmetic number, because the mean of its divisors is an integer number (8900192574).

Almost surely, 2^211233531212 is an apocalyptic number.

211233531212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211233531212 is an abundant number, since it is smaller than the sum of its proper divisors (215975712340).

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

211233531212 is a wasteful number, since it uses less digits than its factorization.

211233531212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148058 (or 148056 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

Adding to 211233531212 its reverse (212135332112), we get a palindrome (423368863324).

Subtracting 211233531212 from its reverse (212135332112), we obtain a square (901800900 = 30030²).

The spelling of 211233531212 in words is "two hundred eleven billion, two hundred thirty-three million, five hundred thirty-one thousand, two hundred twelve".