212100012199993 has 2 divisors, whose sum is σ = 212100012199994. Its totient is φ = 212100012199992.

The previous prime is 212100012199967. The next prime is 212100012200023. The reversal of 212100012199993 is 399991210001212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170536357927849 + 41563654272144 = 13058957^2 + 6446988^2 .

It is a cyclic number.

It is not a de Polignac number, because 212100012199993 - 2⁵ = 212100012199961 is a prime.

It is not a weakly prime, because it can be changed into another prime (212100012799993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050006099996 + 106050006099997.

It is an arithmetic number, because the mean of its divisors is an integer number (106050006099997).

Almost surely, 2^{212100012199993} is an apocalyptic number.

It is an amenable number.

212100012199993 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100012199993 is an equidigital number, since it uses as much as digits as its factorization.

212100012199993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 49.

The spelling of 212100012199993 in words is "two hundred twelve trillion, one hundred billion, twelve million, one hundred ninety-nine thousand, nine hundred ninety-three".