101021111489 has 2 divisors, whose sum is σ = 101021111490. Its totient is φ = 101021111488.

The previous prime is 101021111449. The next prime is 101021111519. The reversal of 101021111489 is 984111120101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87271203889 + 13749907600 = 295417^2 + 117260^2 .

It is an emirp because it is prime and its reverse (984111120101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101021111489 - 2³⁶ = 32301634753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (101021111449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510555744 + 50510555745.

It is an arithmetic number, because the mean of its divisors is an integer number (50510555745).

Almost surely, 2^101021111489 is an apocalyptic number.

It is an amenable number.

101021111489 is a deficient number, since it is larger than the sum of its proper divisors (1).

101021111489 is an equidigital number, since it uses as much as digits as its factorization.

101021111489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 101021111489 in words is "one hundred one billion, twenty-one million, one hundred eleven thousand, four hundred eighty-nine".