1113121103221 has 4 divisors (see below), whose sum is σ = 1113302310912. Its totient is φ = 1112939895532.

The previous prime is 1113121103209. The next prime is 1113121103233. The reversal of 1113121103221 is 1223011213111.

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 an interprime number because it is at equal distance from previous prime (1113121103209) and next prime (1113121103233).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113121103221 is a prime.

It is a super-2 number, since 2×1113121103221² (a number of 25 digits) contains 22 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 (1113121103021) 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, 90594631 + ... + 90606916.

It is an arithmetic number, because the mean of its divisors is an integer number (278325577728).

Almost surely, 2^{1113121103221} is an apocalyptic number.

It is an amenable number.

1113121103221 is a deficient number, since it is larger than the sum of its proper divisors (181207691).

1113121103221 is an equidigital number, since it uses as much as digits as its factorization.

1113121103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181207690.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1113121103221 its reverse (1223011213111), we get a palindrome (2336132316332).

The spelling of 1113121103221 in words is "one trillion, one hundred thirteen billion, one hundred twenty-one million, one hundred three thousand, two hundred twenty-one".