1121420404105 has 4 divisors (see below), whose sum is σ = 1345704484932. Its totient is φ = 897136323280.

The previous prime is 1121420404081. The next prime is 1121420404123. The reversal of 1121420404105 is 5014040241211.

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 862662009616 + 258758394489 = 928796^2 + 508683^2 .

It is not a de Polignac number, because 1121420404105 - 2¹⁷ = 1121420273033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121420404105.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 112142040406 + ... + 112142040415.

It is an arithmetic number, because the mean of its divisors is an integer number (336426121233).

Almost surely, 2^{1121420404105} is an apocalyptic number.

It is an amenable number.

1121420404105 is a deficient number, since it is larger than the sum of its proper divisors (224284080827).

1121420404105 is an equidigital number, since it uses as much as digits as its factorization.

1121420404105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224284080826.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 1121420404105 its reverse (5014040241211), we get a palindrome (6135460645316).

The spelling of 1121420404105 in words is "one trillion, one hundred twenty-one billion, four hundred twenty million, four hundred four thousand, one hundred five".