11231101013221 has 4 divisors (see below), whose sum is σ = 11293151295244. Its totient is φ = 11169050731200.

The previous prime is 11231101013191. The next prime is 11231101013227. The reversal of 11231101013221 is 12231010113211.

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 5498016696225 + 5733084316996 = 2344785^2 + 2394386^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231101013221 - 2¹⁷ = 11231100882149 is a prime.

It is a super-2 number, since 2×11231101013221² (a number of 27 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 (11231101013227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31025140740 + ... + 31025141101.

It is an arithmetic number, because the mean of its divisors is an integer number (2823287823811).

Almost surely, 2^{11231101013221} is an apocalyptic number.

It is an amenable number.

11231101013221 is a deficient number, since it is larger than the sum of its proper divisors (62050282023).

11231101013221 is an equidigital number, since it uses as much as digits as its factorization.

11231101013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62050282022.

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

Adding to 11231101013221 its reverse (12231010113211), we get a palindrome (23462111126432).

The spelling of 11231101013221 in words is "eleven trillion, two hundred thirty-one billion, one hundred one million, thirteen thousand, two hundred twenty-one".