21120330311989 has 2 divisors, whose sum is σ = 21120330311990. Its totient is φ = 21120330311988.

The previous prime is 21120330311959. The next prime is 21120330312019. The reversal of 21120330311989 is 98911303302112.

It is a balanced prime because it is at equal distance from previous prime (21120330311959) and next prime (21120330312019).

It can be written as a sum of positive squares in only one way, i.e., 18632085920100 + 2488244391889 = 4316490^2 + 1577417^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120330311989 - 2²³ = 21120321923381 is a prime.

It is a super-3 number, since 3×21120330311989³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120330311909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560165155994 + 10560165155995.

It is an arithmetic number, because the mean of its divisors is an integer number (10560165155995).

Almost surely, 2^{21120330311989} is an apocalyptic number.

It is an amenable number.

21120330311989 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120330311989 is an equidigital number, since it uses as much as digits as its factorization.

21120330311989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 21120330311989 in words is "twenty-one trillion, one hundred twenty billion, three hundred thirty million, three hundred eleven thousand, nine hundred eighty-nine".