1121311320221 has 8 divisors (see below), whose sum is σ = 1147415591520. Its totient is φ = 1095208288272.

The previous prime is 1121311320211. The next prime is 1121311320247. The reversal of 1121311320221 is 1220231131211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121311320221 - 2³⁴ = 1104131451037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121311320193 and 1121311320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121311320211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1665650 + ... + 2239868.

It is an arithmetic number, because the mean of its divisors is an integer number (143426948940).

Almost surely, 2^{1121311320221} is an apocalyptic number.

It is an amenable number.

1121311320221 is a deficient number, since it is larger than the sum of its proper divisors (26104271299).

1121311320221 is an equidigital number, since it uses as much as digits as its factorization.

1121311320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619675.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1121311320221 its reverse (1220231131211), we get a palindrome (2341542451432).

The spelling of 1121311320221 in words is "one trillion, one hundred twenty-one billion, three hundred eleven million, three hundred twenty thousand, two hundred twenty-one".