1231113300221 has 24 divisors (see below), whose sum is σ = 1509783186240. Its totient is φ = 998954111232.

The previous prime is 1231113300203. The next prime is 1231113300247. The reversal of 1231113300221 is 1220033111321.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1231113300221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231113300193 and 1231113300202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231113305221) 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 23 ways as a sum of consecutive naturals, for example, 5521511 + ... + 5740148.

It is an arithmetic number, because the mean of its divisors is an integer number (62907632760).

Almost surely, 2^{1231113300221} is an apocalyptic number.

It is an amenable number.

1231113300221 is a deficient number, since it is larger than the sum of its proper divisors (278669886019).

1231113300221 is a wasteful number, since it uses less digits than its factorization.

1231113300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11261793 (or 11261786 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1231113300221 its reverse (1220033111321), we get a palindrome (2451146411542).

The spelling of 1231113300221 in words is "one trillion, two hundred thirty-one billion, one hundred thirteen million, three hundred thousand, two hundred twenty-one".