1220011110121 has 12 divisors (see below), whose sum is σ = 1290812883444. Its totient is φ = 1152917568000.

The previous prime is 1220011110103. The next prime is 1220011110127. The reversal of 1220011110121 is 1210111100221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 896409410521 + 323601699600 = 946789^2 + 568860^2 .

It is not a de Polignac number, because 1220011110121 - 2²³ = 1220002721513 is a prime.

It is a super-3 number, since 3×1220011110121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220011110127) 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, 4069120 + ... + 4358641.

It is an arithmetic number, because the mean of its divisors is an integer number (107567740287).

Almost surely, 2^{1220011110121} is an apocalyptic number.

It is an amenable number.

1220011110121 is a deficient number, since it is larger than the sum of its proper divisors (70801773323).

1220011110121 is an equidigital number, since it uses as much as digits as its factorization.

1220011110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428200 (or 8428181 counting only the distinct ones).

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

Adding to 1220011110121 its reverse (1210111100221), we get a palindrome (2430122210342).

The spelling of 1220011110121 in words is "one trillion, two hundred twenty billion, eleven million, one hundred ten thousand, one hundred twenty-one".