1111012121021 has 64 divisors (see below), whose sum is σ = 1353904588800. Its totient is φ = 901451548800.

The previous prime is 1111012121003. The next prime is 1111012121027. The reversal of 1111012121021 is 1201212101111.

It is not a de Polignac number, because 1111012121021 - 2⁶ = 1111012120957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111012120987 and 1111012121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111012121027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 170371241 + ... + 170377761.

It is an arithmetic number, because the mean of its divisors is an integer number (21154759200).

Almost surely, 2^{1111012121021} is an apocalyptic number.

1111012121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111012121021 is a deficient number, since it is larger than the sum of its proper divisors (242892467779).

1111012121021 is an equidigital number, since it uses as much as digits as its factorization.

1111012121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687 (or 6641 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1111012121021 its reverse (1201212101111), we get a palindrome (2312224222132).

The spelling of 1111012121021 in words is "one trillion, one hundred eleven billion, twelve million, one hundred twenty-one thousand, twenty-one".