2221221011121 has 12 divisors (see below), whose sum is σ = 3666777542272. Its totient is φ = 1269269149176.

The previous prime is 2221221011117. The next prime is 2221221011129. The reversal of 2221221011121 is 1211101221222.

It is not a de Polignac number, because 2221221011121 - 2² = 2221221011117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221221011094 and 2221221011103.

It is not an unprimeable number, because it can be changed into a prime (2221221011129) 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, 17628738121 + ... + 17628738246.

Almost surely, 2^{2221221011121} is an apocalyptic number.

2221221011121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2221221011121 is a deficient number, since it is larger than the sum of its proper divisors (1445556531151).

2221221011121 is a wasteful number, since it uses less digits than its factorization.

2221221011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35257476380 (or 35257476377 counting only the distinct ones).

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

Adding to 2221221011121 its reverse (1211101221222), we get a palindrome (3432322232343).

The spelling of 2221221011121 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred twenty-one".