11220120011021 has 16 divisors (see below), whose sum is σ = 12326968074240. Its totient is φ = 10165114151280.

The previous prime is 11220120011017. The next prime is 11220120011027. The reversal of 11220120011021 is 12011002102211.

It is a cyclic number.

It is not a de Polignac number, because 11220120011021 - 2² = 11220120011017 is a prime.

It is a super-2 number, since 2×11220120011021² (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 = 11220120010987 and 11220120011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220120011027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1004765 + ... + 4842498.

It is an arithmetic number, because the mean of its divisors is an integer number (770435504640).

Almost surely, 2^{11220120011021} is an apocalyptic number.

It is an amenable number.

11220120011021 is a deficient number, since it is larger than the sum of its proper divisors (1106848063219).

11220120011021 is a wasteful number, since it uses less digits than its factorization.

11220120011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851696.

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

Adding to 11220120011021 its reverse (12011002102211), we get a palindrome (23231122113232).

The spelling of 11220120011021 in words is "eleven trillion, two hundred twenty billion, one hundred twenty million, eleven thousand, twenty-one".