11321221329989 has 2 divisors, whose sum is σ = 11321221329990. Its totient is φ = 11321221329988.

The previous prime is 11321221329961. The next prime is 11321221330037. The reversal of 11321221329989 is 98992312212311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8218444769089 + 3102776560900 = 2866783^2 + 1761470^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321221329989 - 2¹² = 11321221325893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11321221329989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321221329289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660610664994 + 5660610664995.

It is an arithmetic number, because the mean of its divisors is an integer number (5660610664995).

Almost surely, 2^{11321221329989} is an apocalyptic number.

It is an amenable number.

11321221329989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321221329989 is an equidigital number, since it uses as much as digits as its factorization.

11321221329989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The spelling of 11321221329989 in words is "eleven trillion, three hundred twenty-one billion, two hundred twenty-one million, three hundred twenty-nine thousand, nine hundred eighty-nine".