1221232130223 has 16 divisors (see below), whose sum is σ = 1861165301760. Its totient is φ = 697756874976.

The previous prime is 1221232130219. The next prime is 1221232130231. The reversal of 1221232130223 is 3220312321221.

It is not a de Polignac number, because 1221232130223 - 2² = 1221232130219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221232130193 and 1221232130202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221232130423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3585583 + ... + 3911376.

It is an arithmetic number, because the mean of its divisors is an integer number (116322831360).

Almost surely, 2^{1221232130223} is an apocalyptic number.

1221232130223 is a deficient number, since it is larger than the sum of its proper divisors (639933171537).

1221232130223 is an equidigital number, since it uses as much as digits as its factorization.

1221232130223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7504726.

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

Adding to 1221232130223 its reverse (3220312321221), we get a palindrome (4441544451444).

The spelling of 1221232130223 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-two million, one hundred thirty thousand, two hundred twenty-three".