212120156 has 12 divisors (see below), whose sum is σ = 372533280. Its totient is φ = 105682080.

The previous prime is 212120147. The next prime is 212120159. The reversal of 212120156 is 651021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93236 + ... + 95483.

It is an arithmetic number, because the mean of its divisors is an integer number (31044440).

Almost surely, 2^212120156 is an apocalyptic number.

It is an amenable number.

212120156 is a deficient number, since it is larger than the sum of its proper divisors (160413124).

212120156 is a wasteful number, since it uses less digits than its factorization.

212120156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189004 (or 189002 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 212120156 is about 14564.3453680555. The cubic root of 212120156 is about 596.3858251309.

Adding to 212120156 its reverse (651021212), we get a palindrome (863141368).

The spelling of 212120156 in words is "two hundred twelve million, one hundred twenty thousand, one hundred fifty-six".