2231221111121 has 16 divisors (see below), whose sum is σ = 2451337651200. Its totient is φ = 2021415591888.

The previous prime is 2231221111111. The next prime is 2231221111127. The reversal of 2231221111121 is 1211111221322.

It is a cyclic number.

It is not a de Polignac number, because 2231221111121 - 2¹⁸ = 2231220848977 is a prime.

It is a super-3 number, since 3×2231221111121³ (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 = 2231221111093 and 2231221111102.

It is not an unprimeable number, because it can be changed into a prime (2231221111127) 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 15 ways as a sum of consecutive naturals, for example, 1300910 + ... + 2480888.

It is an arithmetic number, because the mean of its divisors is an integer number (153208603200).

Almost surely, 2^{2231221111121} is an apocalyptic number.

It is an amenable number.

2231221111121 is a deficient number, since it is larger than the sum of its proper divisors (220116540079).

2231221111121 is a wasteful number, since it uses less digits than its factorization.

2231221111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184348.

The product of its digits is 96, while the sum is 20.

Adding to 2231221111121 its reverse (1211111221322), we get a palindrome (3442332332443).

The spelling of 2231221111121 in words is "two trillion, two hundred thirty-one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".