11120121220021 has 16 divisors (see below), whose sum is σ = 12440297520000. Its totient is φ = 9852018457600.

The previous prime is 11120121219997. The next prime is 11120121220049. The reversal of 11120121220021 is 12002212102111.

It is not a de Polignac number, because 11120121220021 - 2¹⁷ = 11120121088949 is a prime.

It is a super-2 number, since 2×11120121220021² (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 = 11120121219977 and 11120121220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120121221021) 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, 12851521 + ... + 13689478.

It is an arithmetic number, because the mean of its divisors is an integer number (777518595000).

Almost surely, 2^{11120121220021} is an apocalyptic number.

11120121220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11120121220021 is a deficient number, since it is larger than the sum of its proper divisors (1320176299979).

11120121220021 is a wasteful number, since it uses less digits than its factorization.

11120121220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26541980.

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

Adding to 11120121220021 its reverse (12002212102111), we get a palindrome (23122333322132).

The spelling of 11120121220021 in words is "eleven trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, twenty-one".