1221231000223 has 8 divisors (see below), whose sum is σ = 1318940252000. Its totient is φ = 1124060092128.

The previous prime is 1221231000193. The next prime is 1221231000263. The reversal of 1221231000223 is 3220001321221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221231000223 - 2¹³ = 1221230992031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221231000223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221231000263) 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, 134581203 + ... + 134590276.

It is an arithmetic number, because the mean of its divisors is an integer number (164867531500).

Almost surely, 2^{1221231000223} is an apocalyptic number.

1221231000223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221231000223 is a deficient number, since it is larger than the sum of its proper divisors (97709251777).

1221231000223 is a wasteful number, since it uses less digits than its factorization.

1221231000223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269171841.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1221231000223 its reverse (3220001321221), we get a palindrome (4441232321444).

The spelling of 1221231000223 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-three", and thus it is an aban number.