221110211201121 has 160 divisors (see below), whose sum is σ = 376876356139008. Its totient is φ = 127879344552960.

The previous prime is 221110211201101. The next prime is 221110211201123. The reversal of 221110211201121 is 121102112011122.

It is a happy number.

221110211201121 is a `hidden beast` number, since 2 + 21 + 110 + 211 + 201 + 121 = 666.

It is not a de Polignac number, because 221110211201121 - 2¹⁸ = 221110210938977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221110211201094 and 221110211201103.

It is not an unprimeable number, because it can be changed into a prime (221110211201123) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 29066673100 + ... + 29066680706.

Almost surely, 2^{221110211201121} is an apocalyptic number.

It is an amenable number.

221110211201121 is a deficient number, since it is larger than the sum of its proper divisors (155766144937887).

221110211201121 is a wasteful number, since it uses less digits than its factorization.

221110211201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10793 (or 10784 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221110211201121 its reverse (121102112011122), we get a palindrome (342212323212243).

The spelling of 221110211201121 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred eleven million, two hundred one thousand, one hundred twenty-one".