1113211230221 has 4 divisors (see below), whose sum is σ = 1113245388444. Its totient is φ = 1113177072000.

The previous prime is 1113211230217. The next prime is 1113211230289. The reversal of 1113211230221 is 1220321123111.

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 343529620996 + 769681609225 = 586114^2 + 877315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113211230221 - 2² = 1113211230217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113211230193 and 1113211230202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113216230221) 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, 17030180 + ... + 17095421.

It is an arithmetic number, because the mean of its divisors is an integer number (278311347111).

Almost surely, 2^{1113211230221} is an apocalyptic number.

It is an amenable number.

1113211230221 is a deficient number, since it is larger than the sum of its proper divisors (34158223).

1113211230221 is an equidigital number, since it uses as much as digits as its factorization.

1113211230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34158222.

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

Adding to 1113211230221 its reverse (1220321123111), we get a palindrome (2333532353332).

The spelling of 1113211230221 in words is "one trillion, one hundred thirteen billion, two hundred eleven million, two hundred thirty thousand, two hundred twenty-one".