212081212 has 18 divisors (see below), whose sum is σ = 431737152. Its totient is φ = 90891864.

The previous prime is 212081159. The next prime is 212081227. The reversal of 212081212 is 212180212.

It is a self number, because there is not a number n which added to its sum of digits gives 212081212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540828 + ... + 541219.

Almost surely, 2^212081212 is an apocalyptic number.

It is an amenable number.

212081212 is an abundant number, since it is smaller than the sum of its proper divisors (219655940).

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

212081212 is a wasteful number, since it uses less digits than its factorization.

212081212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082065 (or 1082056 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 212081212 is about 14563.0083430588. The cubic root of 212081212 is about 596.3493252660.

The spelling of 212081212 in words is "two hundred twelve million, eighty-one thousand, two hundred twelve".