9212020212 has 12 divisors (see below), whose sum is σ = 21494713856. Its totient is φ = 3070673400.

The previous prime is 9212020199. The next prime is 9212020217. The reversal of 9212020212 is 2120202129.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×9212020212² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9212020217) 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, 383834164 + ... + 383834187.

Almost surely, 2^9212020212 is an apocalyptic number.

It is an amenable number.

9212020212 is an abundant number, since it is smaller than the sum of its proper divisors (12282693644).

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

9212020212 is a wasteful number, since it uses less digits than its factorization.

9212020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767668358 (or 767668356 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 9212020212 is about 95979.2696992429. The cubic root of 9212020212 is about 2096.2912780738.

The spelling of 9212020212 in words is "nine billion, two hundred twelve million, twenty thousand, two hundred twelve".