11231221021113 has 4 divisors (see below), whose sum is σ = 14974961361488. Its totient is φ = 7487480680740.

The previous prime is 11231221021099. The next prime is 11231221021127. The reversal of 11231221021113 is 31112012213211.

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 (11231221021099) and next prime (11231221021127).

It is not a de Polignac number, because 11231221021113 - 2¹² = 11231221017017 is a prime.

It is a super-2 number, since 2×11231221021113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11231221021113.

It is not an unprimeable number, because it can be changed into a prime (11231221021183) 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, 1871870170183 + ... + 1871870170188.

It is an arithmetic number, because the mean of its divisors is an integer number (3743740340372).

Almost surely, 2^{11231221021113} is an apocalyptic number.

It is an amenable number.

11231221021113 is a deficient number, since it is larger than the sum of its proper divisors (3743740340375).

11231221021113 is an equidigital number, since it uses as much as digits as its factorization.

11231221021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743740340374.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11231221021113 its reverse (31112012213211), we get a palindrome (42343233234324).

The spelling of 11231221021113 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-one million, twenty-one thousand, one hundred thirteen".