1221231203223 has 8 divisors (see below), whose sum is σ = 1628375511936. Its totient is φ = 814120515000.

The previous prime is 1221231203209. The next prime is 1221231203243. The reversal of 1221231203223 is 3223021321221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221231203223 - 2⁵ = 1221231203191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221231203193 and 1221231203202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221231203243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8320243 + ... + 8465748.

It is an arithmetic number, because the mean of its divisors is an integer number (203546938992).

Almost surely, 2^{1221231203223} is an apocalyptic number.

1221231203223 is a deficient number, since it is larger than the sum of its proper divisors (407144308713).

1221231203223 is a wasteful number, since it uses less digits than its factorization.

1221231203223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16810245.

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

Adding to 1221231203223 its reverse (3223021321221), we get a palindrome (4444252524444).

The spelling of 1221231203223 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred three thousand, two hundred twenty-three".