1121003213221 has 4 divisors (see below), whose sum is σ = 1136791990944. Its totient is φ = 1105214435500.

The previous prime is 1121003213191. The next prime is 1121003213233. The reversal of 1121003213221 is 1223123001211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1121003213221 - 2¹³ = 1121003205029 is a prime.

It is a super-3 number, since 3×1121003213221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121003213251) 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, 7894388755 + ... + 7894388896.

It is an arithmetic number, because the mean of its divisors is an integer number (284197997736).

Almost surely, 2^{1121003213221} is an apocalyptic number.

It is an amenable number.

1121003213221 is a deficient number, since it is larger than the sum of its proper divisors (15788777723).

1121003213221 is an equidigital number, since it uses as much as digits as its factorization.

1121003213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15788777722.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1121003213221 its reverse (1223123001211), we get a palindrome (2344126214432).

The spelling of 1121003213221 in words is "one trillion, one hundred twenty-one billion, three million, two hundred thirteen thousand, two hundred twenty-one".