1220221011121 has 8 divisors (see below), whose sum is σ = 1395253828800. Its totient is φ = 1045367076048.

The previous prime is 1220221011109. The next prime is 1220221011151. The reversal of 1220221011121 is 1211101220221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220221011121 - 2¹⁷ = 1220220880049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220221011095 and 1220221011104.

It is not an unprimeable number, because it can be changed into a prime (1220221011151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44706031 + ... + 44733316.

It is an arithmetic number, because the mean of its divisors is an integer number (174406728600).

Almost surely, 2^{1220221011121} is an apocalyptic number.

It is an amenable number.

1220221011121 is a deficient number, since it is larger than the sum of its proper divisors (175032817679).

1220221011121 is an equidigital number, since it uses as much as digits as its factorization.

1220221011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89441303.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1220221011121 its reverse (1211101220221), we get a palindrome (2431322231342).

The spelling of 1220221011121 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, eleven thousand, one hundred twenty-one".