212091212 has 12 divisors (see below), whose sum is σ = 383132736. Its totient is φ = 102624720.

The previous prime is 212091203. The next prime is 212091233. The reversal of 212091212 is 212190212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855083 + ... + 855330.

It is an arithmetic number, because the mean of its divisors is an integer number (31927728).

Almost surely, 2^212091212 is an apocalyptic number.

It is an amenable number.

212091212 is a deficient number, since it is larger than the sum of its proper divisors (171041524).

212091212 is a wasteful number, since it uses less digits than its factorization.

212091212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710448 (or 1710446 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 212091212 is about 14563.3516746661. The cubic root of 212091212 is about 596.3586980898.

The spelling of 212091212 in words is "two hundred twelve million, ninety-one thousand, two hundred twelve".