1232123132221 has 16 divisors (see below), whose sum is σ = 1305983877120. Its totient is φ = 1160786997360.

The previous prime is 1232123132209. The next prime is 1232123132311. The reversal of 1232123132221 is 1222313212321.

It is a cyclic number.

It is not a de Polignac number, because 1232123132221 - 2⁵ = 1232123132189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232123136221) 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, 3081805 + ... + 3458578.

It is an arithmetic number, because the mean of its divisors is an integer number (81623992320).

Almost surely, 2^{1232123132221} is an apocalyptic number.

It is an amenable number.

1232123132221 is a deficient number, since it is larger than the sum of its proper divisors (73860744899).

1232123132221 is a wasteful number, since it uses less digits than its factorization.

1232123132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540576.

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

Adding to 1232123132221 its reverse (1222313212321), we get a palindrome (2454436344542).

The spelling of 1232123132221 in words is "one trillion, two hundred thirty-two billion, one hundred twenty-three million, one hundred thirty-two thousand, two hundred twenty-one".