2221221121101 has 12 divisors (see below), whose sum is σ = 3295144846812. Its totient is φ = 1440792078336.

The previous prime is 2221221121051. The next prime is 2221221121123. The reversal of 2221221121101 is 1011211221222.

2221221121101 is a `hidden beast` number, since 2 + 221 + 221 + 121 + 101 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2150619317001 + 70601804100 = 1466499^2 + 265710^2 .

It is not a de Polignac number, because 2221221121101 - 2⁷ = 2221221120973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221221121001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3335166516 + ... + 3335167181.

It is an arithmetic number, because the mean of its divisors is an integer number (274595403901).

Almost surely, 2^{2221221121101} is an apocalyptic number.

It is an amenable number.

2221221121101 is a deficient number, since it is larger than the sum of its proper divisors (1073923725711).

2221221121101 is a wasteful number, since it uses less digits than its factorization.

2221221121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670333740 (or 6670333737 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2221221121101 its reverse (1011211221222), we get a palindrome (3232432342323).

It can be divided in two parts, 2221221121 and 101, that added together give a palindrome (2221221222).

The spelling of 2221221121101 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".