1220011011121 has 16 divisors (see below), whose sum is σ = 1412768044800. Its totient is φ = 1031918139648.

The previous prime is 1220011011103. The next prime is 1220011011137. The reversal of 1220011011121 is 1211101100221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220011011121 - 2¹¹ = 1220011009073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220011011221) 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, 1633236 + ... + 2259973.

It is an arithmetic number, because the mean of its divisors is an integer number (88298002800).

Almost surely, 2^{1220011011121} is an apocalyptic number.

It is an amenable number.

1220011011121 is a deficient number, since it is larger than the sum of its proper divisors (192757033679).

1220011011121 is an equidigital number, since it uses as much as digits as its factorization.

1220011011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893808.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1220011011121 its reverse (1211101100221), we get a palindrome (2431112111342).

The spelling of 1220011011121 in words is "one trillion, two hundred twenty billion, eleven million, eleven thousand, one hundred twenty-one".