11121220021021 has 8 divisors (see below), whose sum is σ = 12132268514784. Its totient is φ = 10110176275920.

The previous prime is 11121220020961. The next prime is 11121220021027. The reversal of 11121220021021 is 12012002212111.

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 11121220021021 - 2¹¹ = 11121220018973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121220020986 and 11121220021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121220021027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5207151 + ... + 7025443.

It is an arithmetic number, because the mean of its divisors is an integer number (1516533564348).

Almost surely, 2^{11121220021021} is an apocalyptic number.

11121220021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121220021021 is a deficient number, since it is larger than the sum of its proper divisors (1011048493763).

11121220021021 is a wasteful number, since it uses less digits than its factorization.

11121220021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374331.

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

Adding to 11121220021021 its reverse (12012002212111), we get a palindrome (23133222233132).

The spelling of 11121220021021 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty million, twenty-one thousand, twenty-one".