11021011220121 has 64 divisors (see below), whose sum is σ = 17182066176000. Its totient is φ = 6281048043648.

The previous prime is 11021011220081. The next prime is 11021011220129. The reversal of 11021011220121 is 12102211012011.

It is a happy number.

It is not a de Polignac number, because 11021011220121 - 2²⁵ = 11020977665689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11021011220121.

It is not an unprimeable number, because it can be changed into a prime (11021011220129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 991716861 + ... + 991727973.

It is an arithmetic number, because the mean of its divisors is an integer number (268469784000).

Almost surely, 2^{11021011220121} is an apocalyptic number.

It is an amenable number.

11021011220121 is a deficient number, since it is larger than the sum of its proper divisors (6161054955879).

11021011220121 is a wasteful number, since it uses less digits than its factorization.

11021011220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13603 (or 13589 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11021011220121 its reverse (12102211012011), we get a palindrome (23123222232132).

The spelling of 11021011220121 in words is "eleven trillion, twenty-one billion, eleven million, two hundred twenty thousand, one hundred twenty-one".