11121102002021 has 12 divisors (see below), whose sum is σ = 12224112127500. Its totient is φ = 10110017533440.

The previous prime is 11121102001979. The next prime is 11121102002033. The reversal of 11121102002021 is 12020020112111.

It can be written as a sum of positive squares in 2 ways, for example, as 5970081390625 + 5151020611396 = 2443375^2 + 2269586^2 .

It is not a de Polignac number, because 11121102002021 - 2¹⁰ = 11121102000997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121102001987 and 11121102002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121102002071) 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 11 ways as a sum of consecutive naturals, for example, 22008005 + ... + 22507653.

It is an arithmetic number, because the mean of its divisors is an integer number (1018676010625).

Almost surely, 2^{11121102002021} is an apocalyptic number.

11121102002021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121102002021 is a deficient number, since it is larger than the sum of its proper divisors (1103010125479).

11121102002021 is a wasteful number, since it uses less digits than its factorization.

11121102002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683620 (or 683609 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121102002021 its reverse (12020020112111), we get a palindrome (23141122114132).

The spelling of 11121102002021 in words is "eleven trillion, one hundred twenty-one billion, one hundred two million, two thousand, twenty-one".