2231120223121 has 4 divisors (see below), whose sum is σ = 2246094184500. Its totient is φ = 2216146261744.

The previous prime is 2231120223083. The next prime is 2231120223181. The reversal of 2231120223121 is 1213220211322.

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 252441934096 + 1978678289025 = 502436^2 + 1406655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231120223121 - 2¹⁵ = 2231120190353 is a prime.

It is a super-3 number, since 3×2231120223121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231120223092 and 2231120223101.

It is not an unprimeable number, because it can be changed into a prime (2231120223181) 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 3 ways as a sum of consecutive naturals, for example, 7486980466 + ... + 7486980763.

It is an arithmetic number, because the mean of its divisors is an integer number (561523546125).

Almost surely, 2^{2231120223121} is an apocalyptic number.

It is an amenable number.

2231120223121 is a deficient number, since it is larger than the sum of its proper divisors (14973961379).

2231120223121 is a wasteful number, since it uses less digits than its factorization.

2231120223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14973961378.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2231120223121 its reverse (1213220211322), we get a palindrome (3444340434443).

The spelling of 2231120223121 in words is "two trillion, two hundred thirty-one billion, one hundred twenty million, two hundred twenty-three thousand, one hundred twenty-one".