212111021212 has 12 divisors (see below), whose sum is σ = 376422376176. Its totient is φ = 104561770880.

The previous prime is 212111021203. The next prime is 212111021219. The reversal of 212111021212 is 212120111212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111021219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373434613 + ... + 373435180.

It is an arithmetic number, because the mean of its divisors is an integer number (31368531348).

Almost surely, 2^212111021212 is an apocalyptic number.

It is an amenable number.

212111021212 is a deficient number, since it is larger than the sum of its proper divisors (164311354964).

212111021212 is a wasteful number, since it uses less digits than its factorization.

212111021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746869868 (or 746869866 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212111021212 its reverse (212120111212), we get a palindrome (424231132424).

The spelling of 212111021212 in words is "two hundred twelve billion, one hundred eleven million, twenty-one thousand, two hundred twelve".