2221101111121 has 12 divisors (see below), whose sum is σ = 2326841545392. Its totient is φ = 2119981943816.

The previous prime is 2221101111113. The next prime is 2221101111127. The reversal of 2221101111121 is 1211111011222.

It is not a de Polignac number, because 2221101111121 - 2³ = 2221101111113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221101111095 and 2221101111104.

It is not an unprimeable number, because it can be changed into a prime (2221101111127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4248331 + ... + 4742416.

It is an arithmetic number, because the mean of its divisors is an integer number (193903462116).

Almost surely, 2^{2221101111121} is an apocalyptic number.

It is an amenable number.

2221101111121 is a deficient number, since it is larger than the sum of its proper divisors (105740434271).

2221101111121 is an equidigital number, since it uses as much as digits as its factorization.

2221101111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8991260 (or 8991237 counting only the distinct ones).

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

Adding to 2221101111121 its reverse (1211111011222), we get a palindrome (3432212122343).

The spelling of 2221101111121 in words is "two trillion, two hundred twenty-one billion, one hundred one million, one hundred eleven thousand, one hundred twenty-one".