212220019951 has 2 divisors, whose sum is σ = 212220019952. Its totient is φ = 212220019950.

The previous prime is 212220019903. The next prime is 212220020063. The reversal of 212220019951 is 159910022212.

212220019951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212220019951 - 2¹¹ = 212220017903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220019051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110009975 + 106110009976.

It is an arithmetic number, because the mean of its divisors is an integer number (106110009976).

Almost surely, 2^212220019951 is an apocalyptic number.

212220019951 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220019951 is an equidigital number, since it uses as much as digits as its factorization.

212220019951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 212220019951 in words is "two hundred twelve billion, two hundred twenty million, nineteen thousand, nine hundred fifty-one".