1111021001021 has 2 divisors, whose sum is σ = 1111021001022. Its totient is φ = 1111021001020.

The previous prime is 1111021001017. The next prime is 1111021001047. The reversal of 1111021001021 is 1201001201111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587083893796 + 523937107225 = 766214^2 + 723835^2 .

It is an emirp because it is prime and its reverse (1201001201111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111021001021 - 2² = 1111021001017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111021000993 and 1111021001011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111021001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555510500510 + 555510500511.

It is an arithmetic number, because the mean of its divisors is an integer number (555510500511).

Almost surely, 2^{1111021001021} is an apocalyptic number.

It is an amenable number.

1111021001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111021001021 is an equidigital number, since it uses as much as digits as its factorization.

1111021001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1111021001021 its reverse (1201001201111), we get a palindrome (2312022202132).

The spelling of 1111021001021 in words is "one trillion, one hundred eleven billion, twenty-one million, one thousand, twenty-one".