1220000001121 has 16 divisors (see below), whose sum is σ = 1332562420800. Its totient is φ = 1107713793600.

The previous prime is 1220000001091. The next prime is 1220000001169. The reversal of 1220000001121 is 1211000000221.

It is a cyclic number.

It is not a de Polignac number, because 1220000001121 - 2¹⁵ = 1219999968353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220000001098 and 1220000001107.

It is not an unprimeable number, because it can be changed into a prime (1220000002121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43388415 + ... + 43416523.

It is an arithmetic number, because the mean of its divisors is an integer number (83285151300).

Almost surely, 2^{1220000001121} is an apocalyptic number.

1220000001121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220000001121 is a deficient number, since it is larger than the sum of its proper divisors (112562419679).

1220000001121 is a wasteful number, since it uses less digits than its factorization.

1220000001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32880.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220000001121 its reverse (1211000000221), we get a palindrome (2431000001342).

The spelling of 1220000001121 in words is "one trillion, two hundred twenty billion, one thousand, one hundred twenty-one".