2231223312121 has 16 divisors (see below), whose sum is σ = 2254106620800. Its totient is φ = 2208463141248.

The previous prime is 2231223312113. The next prime is 2231223312169. The reversal of 2231223312121 is 1212133221322.

It is a cyclic number.

It is not a de Polignac number, because 2231223312121 - 2³ = 2231223312113 is a prime.

It is a super-3 number, since 3×2231223312121³ (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 (2231223312181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53693170 + ... + 53734708.

It is an arithmetic number, because the mean of its divisors is an integer number (140881663800).

Almost surely, 2^{2231223312121} is an apocalyptic number.

It is an amenable number.

2231223312121 is a deficient number, since it is larger than the sum of its proper divisors (22883308679).

2231223312121 is a wasteful number, since it uses less digits than its factorization.

2231223312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43008.

The product of its digits is 1728, while the sum is 25.

Adding to 2231223312121 its reverse (1212133221322), we get a palindrome (3443356533443).

The spelling of 2231223312121 in words is "two trillion, two hundred thirty-one billion, two hundred twenty-three million, three hundred twelve thousand, one hundred twenty-one".