11011121101021 has 2 divisors, whose sum is σ = 11011121101022. Its totient is φ = 11011121101020.

The previous prime is 11011121100971. The next prime is 11011121101027. The reversal of 11011121101021 is 12010112111011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6719946705796 + 4291174395225 = 2592286^2 + 2071515^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011121101021 - 2¹⁹ = 11011120576733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011121100992 and 11011121101010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011121101027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505560550510 + 5505560550511.

It is an arithmetic number, because the mean of its divisors is an integer number (5505560550511).

Almost surely, 2^{11011121101021} is an apocalyptic number.

It is an amenable number.

11011121101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011121101021 is an equidigital number, since it uses as much as digits as its factorization.

11011121101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11011121101021 its reverse (12010112111011), we get a palindrome (23021233212032).

The spelling of 11011121101021 in words is "eleven trillion, eleven billion, one hundred twenty-one million, one hundred one thousand, twenty-one".