1223221223121 has 8 divisors (see below), whose sum is σ = 1633976349504. Its totient is φ = 813973456080.

The previous prime is 1223221223099. The next prime is 1223221223141. The reversal of 1223221223121 is 1213221223221.

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

It is not a de Polignac number, because 1223221223121 - 2¹⁴ = 1223221206737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1223221223091 and 1223221223100.

It is not an unprimeable number, because it can be changed into a prime (1223221223141) 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, 376837941 + ... + 376841186.

It is an arithmetic number, because the mean of its divisors is an integer number (204247043688).

Almost surely, 2^{1223221223121} is an apocalyptic number.

It is an amenable number.

1223221223121 is a deficient number, since it is larger than the sum of its proper divisors (410755126383).

1223221223121 is an equidigital number, since it uses as much as digits as its factorization.

1223221223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753679671.

The product of its digits is 1152, while the sum is 24.

Adding to 1223221223121 its reverse (1213221223221), we get a palindrome (2436442446342).

The spelling of 1223221223121 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty-one".