211202021212 has 48 divisors (see below), whose sum is σ = 455209592320. Its totient is φ = 83494971072.

The previous prime is 211202021209. The next prime is 211202021213. The reversal of 211202021212 is 212120202112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202021213) 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, 332233 + ... + 729919.

Almost surely, 2^211202021212 is an apocalyptic number.

It is an amenable number.

211202021212 is an abundant number, since it is smaller than the sum of its proper divisors (244007571108).

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

211202021212 is a wasteful number, since it uses less digits than its factorization.

211202021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399170 (or 399168 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211202021212 its reverse (212120202112), we get a palindrome (423322223324).

The spelling of 211202021212 in words is "two hundred eleven billion, two hundred two million, twenty-one thousand, two hundred twelve".