1221230023205 has 8 divisors (see below), whose sum is σ = 1496656369152. Its totient is φ = 956197124368.

The previous prime is 1221230023199. The next prime is 1221230023217. The reversal of 1221230023205 is 5023200321221.

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 1221230023205 - 2⁶ = 1221230023141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598361517 + ... + 2598361986.

It is an arithmetic number, because the mean of its divisors is an integer number (187082046144).

Almost surely, 2^{1221230023205} is an apocalyptic number.

It is an amenable number.

1221230023205 is a deficient number, since it is larger than the sum of its proper divisors (275426345947).

1221230023205 is an equidigital number, since it uses as much as digits as its factorization.

1221230023205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196723555.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 1221230023205 its reverse (5023200321221), we get a palindrome (6244430344426).

The spelling of 1221230023205 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, twenty-three thousand, two hundred five".