11221222202021 has 24 divisors (see below), whose sum is σ = 12272284920456. Its totient is φ = 10254502502400.

The previous prime is 11221222201999. The next prime is 11221222202039. The reversal of 11221222202021 is 12020222212211.

11221222202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 2363872425121 + 8857349776900 = 1537489^2 + 2976130^2 .

It is not a de Polignac number, because 11221222202021 - 2⁶ = 11221222201957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11221222201984 and 11221222202002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221222202081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221069381 + ... + 221120133.

It is an arithmetic number, because the mean of its divisors is an integer number (511345205019).

Almost surely, 2^{11221222202021} is an apocalyptic number.

It is an amenable number.

11221222202021 is a deficient number, since it is larger than the sum of its proper divisors (1051062718435).

11221222202021 is a wasteful number, since it uses less digits than its factorization.

11221222202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63833 (or 63820 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11221222202021 its reverse (12020222212211), we get a palindrome (23241444414232).

The spelling of 11221222202021 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred two thousand, twenty-one".