2231213111121 has 4 divisors (see below), whose sum is σ = 2974950814832. Its totient is φ = 1487475407412.

The previous prime is 2231213111117. The next prime is 2231213111161. The reversal of 2231213111121 is 1211113121322.

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 2231213111121 - 2² = 2231213111117 is a prime.

It is a super-3 number, since 3×2231213111121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231213111161) 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, 371868851851 + ... + 371868851856.

It is an arithmetic number, because the mean of its divisors is an integer number (743737703708).

Almost surely, 2^{2231213111121} is an apocalyptic number.

It is an amenable number.

2231213111121 is a deficient number, since it is larger than the sum of its proper divisors (743737703711).

2231213111121 is an equidigital number, since it uses as much as digits as its factorization.

2231213111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743737703710.

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

Adding to 2231213111121 its reverse (1211113121322), we get a palindrome (3442326232443).

The spelling of 2231213111121 in words is "two trillion, two hundred thirty-one billion, two hundred thirteen million, one hundred eleven thousand, one hundred twenty-one".