10011010111021 has 2 divisors, whose sum is σ = 10011010111022. Its totient is φ = 10011010111020.

The previous prime is 10011010111007. The next prime is 10011010111027. The reversal of 10011010111021 is 12011101011001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9052510370121 + 958499740900 = 3008739^2 + 979030^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011010111021 - 2⁴³ = 1214917088813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10011010110989 and 10011010111007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011010111027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005505055510 + 5005505055511.

It is an arithmetic number, because the mean of its divisors is an integer number (5005505055511).

Almost surely, 2^{10011010111021} is an apocalyptic number.

It is an amenable number.

10011010111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011010111021 is an equidigital number, since it uses as much as digits as its factorization.

10011010111021 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 10.

Adding to 10011010111021 its reverse (12011101011001), we get a palindrome (22022111122022).

The spelling of 10011010111021 in words is "ten trillion, eleven billion, ten million, one hundred eleven thousand, twenty-one".