212100220220989 has 2 divisors, whose sum is σ = 212100220220990. Its totient is φ = 212100220220988.

The previous prime is 212100220220983. The next prime is 212100220221037. The reversal of 212100220220989 is 989022022001212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212094308917764 + 5911303225 = 14563458^2 + 76885^2 .

It is a cyclic number.

It is not a de Polignac number, because 212100220220989 - 2⁴⁵ = 176915848132157 is a prime.

It is a super-2 number, since 2×212100220220989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212100220220983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050110110494 + 106050110110495.

It is an arithmetic number, because the mean of its divisors is an integer number (106050110110495).

Almost surely, 2^{212100220220989} is an apocalyptic number.

It is an amenable number.

212100220220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100220220989 is an equidigital number, since it uses as much as digits as its factorization.

212100220220989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 212100220220989 in words is "two hundred twelve trillion, one hundred billion, two hundred twenty million, two hundred twenty thousand, nine hundred eighty-nine".