1220110011121 has 4 divisors (see below), whose sum is σ = 1240111814644. Its totient is φ = 1200108207600.

The previous prime is 1220110011077. The next prime is 1220110011179. The reversal of 1220110011121 is 1211100110221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 318248298225 + 901861712896 = 564135^2 + 949664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220110011121 - 2¹³ = 1220110002929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220110011191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10000901670 + ... + 10000901791.

It is an arithmetic number, because the mean of its divisors is an integer number (310027953661).

Almost surely, 2^{1220110011121} is an apocalyptic number.

It is an amenable number.

1220110011121 is a deficient number, since it is larger than the sum of its proper divisors (20001803523).

1220110011121 is an equidigital number, since it uses as much as digits as its factorization.

1220110011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001803522.

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

Adding to 1220110011121 its reverse (1211100110221), we get a palindrome (2431210121342).

The spelling of 1220110011121 in words is "one trillion, two hundred twenty billion, one hundred ten million, eleven thousand, one hundred twenty-one".