1121221011101 has 4 divisors (see below), whose sum is σ = 1142376124572. Its totient is φ = 1100065897632.

The previous prime is 1121221011083. The next prime is 1121221011107. The reversal of 1121221011101 is 1011101221211.

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 936054315001 + 185166696100 = 967499^2 + 430310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121221011101 - 2⁶ = 1121221011037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121221011107) 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, 10577556656 + ... + 10577556761.

It is an arithmetic number, because the mean of its divisors is an integer number (285594031143).

Almost surely, 2^{1121221011101} is an apocalyptic number.

It is an amenable number.

1121221011101 is a deficient number, since it is larger than the sum of its proper divisors (21155113471).

1121221011101 is an equidigital number, since it uses as much as digits as its factorization.

1121221011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21155113470.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1121221011101 its reverse (1011101221211), we get a palindrome (2132322232312).

The spelling of 1121221011101 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred one".