221200012220989 has 2 divisors, whose sum is σ = 221200012220990. Its totient is φ = 221200012220988.

The previous prime is 221200012220963. The next prime is 221200012221079. The reversal of 221200012220989 is 989022210002122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150323734592964 + 70876277628025 = 12260658^2 + 8418805^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200012220989 - 2¹⁹ = 221200011696701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221200012220959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600006110494 + 110600006110495.

It is an arithmetic number, because the mean of its divisors is an integer number (110600006110495).

Almost surely, 2^{221200012220989} is an apocalyptic number.

It is an amenable number.

221200012220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200012220989 is an equidigital number, since it uses as much as digits as its factorization.

221200012220989 is an evil number, because the sum of its binary digits is even.

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

The spelling of 221200012220989 in words is "two hundred twenty-one trillion, two hundred billion, twelve million, two hundred twenty thousand, nine hundred eighty-nine".