20021220300989 has 2 divisors, whose sum is σ = 20021220300990. Its totient is φ = 20021220300988.

The previous prime is 20021220300857. The next prime is 20021220301013. The reversal of 20021220300989 is 98900302212002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18835643400025 + 1185576900964 = 4340005^2 + 1088842^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021220300989 - 2⁸ = 20021220300733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021210300989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010610150494 + 10010610150495.

It is an arithmetic number, because the mean of its divisors is an integer number (10010610150495).

Almost surely, 2^{20021220300989} is an apocalyptic number.

It is an amenable number.

20021220300989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021220300989 is an equidigital number, since it uses as much as digits as its factorization.

20021220300989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 20021220300989 in words is "twenty trillion, twenty-one billion, two hundred twenty million, three hundred thousand, nine hundred eighty-nine".