1231203322221 has 16 divisors (see below), whose sum is σ = 1742012075520. Its totient is φ = 771808122800.

The previous prime is 1231203322201. The next prime is 1231203322253. The reversal of 1231203322221 is 1222233021321.

It is a cyclic number.

It is not a de Polignac number, because 1231203322221 - 2¹⁴ = 1231203305837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231203322191 and 1231203322200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231203322201) 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, 151212255 + ... + 151220396.

It is an arithmetic number, because the mean of its divisors is an integer number (108875754720).

Almost surely, 2^{1231203322221} is an apocalyptic number.

It is an amenable number.

1231203322221 is a deficient number, since it is larger than the sum of its proper divisors (510808753299).

1231203322221 is a wasteful number, since it uses less digits than its factorization.

1231203322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302432736.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1231203322221 its reverse (1222233021321), we get a palindrome (2453436343542).

The spelling of 1231203322221 in words is "one trillion, two hundred thirty-one billion, two hundred three million, three hundred twenty-two thousand, two hundred twenty-one".