212120983 has 2 divisors, whose sum is σ = 212120984. Its totient is φ = 212120982.

The previous prime is 212120977. The next prime is 212121023. The reversal of 212120983 is 389021212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120983 is a prime.

It is a super-3 number, since 3×212120983³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060491 + 106060492.

It is an arithmetic number, because the mean of its divisors is an integer number (106060492).

Almost surely, 2^212120983 is an apocalyptic number.

212120983 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120983 is an equidigital number, since it uses as much as digits as its factorization.

212120983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 212120983 is about 14564.3737592799. The cubic root of 212120983 is about 596.3866001797.

It can be divided in two parts, 2121 and 20983, that added together give a square (23104 = 152²).

The spelling of 212120983 in words is "two hundred twelve million, one hundred twenty thousand, nine hundred eighty-three".