11121202001221 has 16 divisors (see below), whose sum is σ = 12696486793200. Its totient is φ = 9650203757568.

The previous prime is 11121202001141. The next prime is 11121202001251. The reversal of 11121202001221 is 12210020212111.

It can be written as a sum of positive squares in 8 ways, for example, as 978346504996 + 10142855496225 = 989114^2 + 3184785^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121202001221 - 2⁷ = 11121202001093 is a prime.

It is a super-2 number, since 2×11121202001221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121202001195 and 11121202001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121202001251) 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 15 ways as a sum of consecutive naturals, for example, 30167926 + ... + 30534343.

It is an arithmetic number, because the mean of its divisors is an integer number (793530424575).

Almost surely, 2^{11121202001221} is an apocalyptic number.

It is an amenable number.

11121202001221 is a deficient number, since it is larger than the sum of its proper divisors (1575284791979).

11121202001221 is a wasteful number, since it uses less digits than its factorization.

11121202001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60703128.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11121202001221 its reverse (12210020212111), we get a palindrome (23331222213332).

The spelling of 11121202001221 in words is "eleven trillion, one hundred twenty-one billion, two hundred two million, one thousand, two hundred twenty-one".