1121102102221 has 4 divisors (see below), whose sum is σ = 1121217725212. Its totient is φ = 1120986479232.

The previous prime is 1121102102213. The next prime is 1121102102317. The reversal of 1121102102221 is 1222012011211.

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 137159122500 + 983942979721 = 370350^2 + 991939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121102102221 - 2³ = 1121102102213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121102102195 and 1121102102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121102103221) 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, 57796950 + ... + 57816343.

It is an arithmetic number, because the mean of its divisors is an integer number (280304431303).

Almost surely, 2^{1121102102221} is an apocalyptic number.

It is an amenable number.

1121102102221 is a deficient number, since it is larger than the sum of its proper divisors (115622991).

1121102102221 is an equidigital number, since it uses as much as digits as its factorization.

1121102102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115622990.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121102102221 its reverse (1222012011211), we get a palindrome (2343114113432).

The spelling of 1121102102221 in words is "one trillion, one hundred twenty-one billion, one hundred two million, one hundred two thousand, two hundred twenty-one".