1223230312021 has 4 divisors (see below), whose sum is σ = 1223306121600. Its totient is φ = 1223154502444.

The previous prime is 1223230311973. The next prime is 1223230312039. The reversal of 1223230312021 is 1202130323221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223230312021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223230311983 and 1223230312001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223230312721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37880581 + ... + 37912858.

It is an arithmetic number, because the mean of its divisors is an integer number (305826530400).

Almost surely, 2^{1223230312021} is an apocalyptic number.

It is an amenable number.

1223230312021 is a deficient number, since it is larger than the sum of its proper divisors (75809579).

1223230312021 is an equidigital number, since it uses as much as digits as its factorization.

1223230312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75809578.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1223230312021 its reverse (1202130323221), we get a palindrome (2425360635242).

The spelling of 1223230312021 in words is "one trillion, two hundred twenty-three billion, two hundred thirty million, three hundred twelve thousand, twenty-one".