1121011110221 has 4 divisors (see below), whose sum is σ = 1186952940252. Its totient is φ = 1055069280192.

The previous prime is 1121011110181. The next prime is 1121011110251. The reversal of 1121011110221 is 1220111101211.

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 770682073225 + 350329036996 = 877885^2 + 591886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121011110221 - 2¹⁴ = 1121011093837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121011110196 and 1121011110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121011110251) 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, 32970914990 + ... + 32970915023.

It is an arithmetic number, because the mean of its divisors is an integer number (296738235063).

Almost surely, 2^{1121011110221} is an apocalyptic number.

It is an amenable number.

1121011110221 is a deficient number, since it is larger than the sum of its proper divisors (65941830031).

1121011110221 is an equidigital number, since it uses as much as digits as its factorization.

1121011110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65941830030.

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

Adding to 1121011110221 its reverse (1220111101211), we get a palindrome (2341122211432).

The spelling of 1121011110221 in words is "one trillion, one hundred twenty-one billion, eleven million, one hundred ten thousand, two hundred twenty-one".