2221120122021 has 16 divisors (see below), whose sum is σ = 3298043900800. Its totient is φ = 1477373740704.

The previous prime is 2221120121917. The next prime is 2221120122029. The reversal of 2221120122021 is 1202210211222.

It is a happy number.

2221120122021 is a `hidden beast` number, since 2 + 221 + 1 + 201 + 220 + 21 = 666.

It is not a de Polignac number, because 2221120122021 - 2¹³ = 2221120113829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221120121985 and 2221120122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221120122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93682576 + ... + 93706281.

It is an arithmetic number, because the mean of its divisors is an integer number (206127743800).

Almost surely, 2^{2221120122021} is an apocalyptic number.

It is an amenable number.

2221120122021 is a deficient number, since it is larger than the sum of its proper divisors (1076923778779).

2221120122021 is a wasteful number, since it uses less digits than its factorization.

2221120122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187389305 (or 187389299 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221120122021 its reverse (1202210211222), we get a palindrome (3423330333243).

It can be divided in two parts, 22211201 and 22021, that added together give a palindrome (22233222).

The spelling of 2221120122021 in words is "two trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".