10111101110021 has 2 divisors, whose sum is σ = 10111101110022. Its totient is φ = 10111101110020.

The previous prime is 10111101109937. The next prime is 10111101110039. The reversal of 10111101110021 is 12001110111101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8649628050625 + 1461473059396 = 2941025^2 + 1208914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111101110021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111101109984 and 10111101110011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111101110051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055550555010 + 5055550555011.

It is an arithmetic number, because the mean of its divisors is an integer number (5055550555011).

Almost surely, 2^{10111101110021} is an apocalyptic number.

It is an amenable number.

10111101110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111101110021 is an equidigital number, since it uses as much as digits as its factorization.

10111101110021 is an evil number, because the sum of its binary digits is even.

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

Adding to 10111101110021 its reverse (12001110111101), we get a palindrome (22112211221122).

The spelling of 10111101110021 in words is "ten trillion, one hundred eleven billion, one hundred one million, one hundred ten thousand, twenty-one".