11231203012221 has 4 divisors (see below), whose sum is σ = 14974937349632. Its totient is φ = 7487468674812.

The previous prime is 11231203012207. The next prime is 11231203012259. The reversal of 11231203012221 is 12221030213211.

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 not a de Polignac number, because 11231203012221 - 2⁷ = 11231203012093 is a prime.

It is a super-2 number, since 2×11231203012221² (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 (11231203012201) 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, 1871867168701 + ... + 1871867168706.

It is an arithmetic number, because the mean of its divisors is an integer number (3743734337408).

Almost surely, 2^{11231203012221} is an apocalyptic number.

It is an amenable number.

11231203012221 is a deficient number, since it is larger than the sum of its proper divisors (3743734337411).

11231203012221 is an equidigital number, since it uses as much as digits as its factorization.

11231203012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743734337410.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11231203012221 its reverse (12221030213211), we get a palindrome (23452233225432).

The spelling of 11231203012221 in words is "eleven trillion, two hundred thirty-one billion, two hundred three million, twelve thousand, two hundred twenty-one".