212191593212 has 12 divisors (see below), whose sum is σ = 387480300816. Its totient is φ = 101482935840.

The previous prime is 212191593199. The next prime is 212191593217. The reversal of 212191593212 is 212395191212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212191593217) 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, 1153215089 + ... + 1153215272.

It is an arithmetic number, because the mean of its divisors is an integer number (32290025068).

Almost surely, 2^212191593212 is an apocalyptic number.

It is an amenable number.

212191593212 is a deficient number, since it is larger than the sum of its proper divisors (175288707604).

212191593212 is a wasteful number, since it uses less digits than its factorization.

212191593212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306430388 (or 2306430386 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The spelling of 212191593212 in words is "two hundred twelve billion, one hundred ninety-one million, five hundred ninety-three thousand, two hundred twelve".