221120111200121 has 16 divisors (see below), whose sum is σ = 267691842322560. Its totient is φ = 178303993217280.

The previous prime is 221120111200069. The next prime is 221120111200169. The reversal of 221120111200121 is 121002111021122.

It is not a de Polignac number, because 221120111200121 - 2³⁴ = 221102931330937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221120111200121.

It is not an unprimeable number, because it can be changed into a prime (221120111200171) 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, 409194995 + ... + 409735016.

It is an arithmetic number, because the mean of its divisors is an integer number (16730740145160).

Almost surely, 2^{221120111200121} is an apocalyptic number.

It is an amenable number.

221120111200121 is a deficient number, since it is larger than the sum of its proper divisors (46571731122439).

221120111200121 is a wasteful number, since it uses less digits than its factorization.

221120111200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818932304.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221120111200121 its reverse (121002111021122), we get a palindrome (342122222221243).

The spelling of 221120111200121 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred eleven million, two hundred thousand, one hundred twenty-one".