101011110110021 has 2 divisors, whose sum is σ = 101011110110022. Its totient is φ = 101011110110020.

The previous prime is 101011110110003. The next prime is 101011110110111. The reversal of 101011110110021 is 120011011110101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75453788179396 + 25557321930625 = 8686414^2 + 5055425^2 .

It is an emirp because it is prime and its reverse (120011011110101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101011110110021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101011110109984 and 101011110110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101011110110321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505555055010 + 50505555055011.

It is an arithmetic number, because the mean of its divisors is an integer number (50505555055011).

Almost surely, 2^{101011110110021} is an apocalyptic number.

It is an amenable number.

101011110110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101011110110021 is an equidigital number, since it uses as much as digits as its factorization.

101011110110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 101011110110021 its reverse (120011011110101), we get a palindrome (221022121220122).

The spelling of 101011110110021 in words is "one hundred one trillion, eleven billion, one hundred ten million, one hundred ten thousand, twenty-one".