11220121100021 has 8 divisors (see below), whose sum is σ = 11331293313024. Its totient is φ = 11108950493200.

The previous prime is 11220121100011. The next prime is 11220121100113. The reversal of 11220121100021 is 12000112102211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11220121100021 - 2³⁴ = 11202941230837 is a prime.

It is a super-2 number, since 2×11220121100021² (a number of 27 digits) contains 22 as substring.

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 = 11220121099969 and 11220121100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220121100011) 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 7 ways as a sum of consecutive naturals, for example, 17629676 + ... + 18255018.

It is an arithmetic number, because the mean of its divisors is an integer number (1416411664128).

Almost surely, 2^{11220121100021} is an apocalyptic number.

It is an amenable number.

11220121100021 is a deficient number, since it is larger than the sum of its proper divisors (111172213003).

11220121100021 is a wasteful number, since it uses less digits than its factorization.

11220121100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803091.

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

Adding to 11220121100021 its reverse (12000112102211), we get a palindrome (23220233202232).

The spelling of 11220121100021 in words is "eleven trillion, two hundred twenty billion, one hundred twenty-one million, one hundred thousand, twenty-one".