1223221210121 has 8 divisors (see below), whose sum is σ = 1228733220000. Its totient is φ = 1217712807360.

The previous prime is 1223221210111. The next prime is 1223221210151. The reversal of 1223221210121 is 1210121223221.

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 1223221210121 - 2²² = 1223217015817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223221210093 and 1223221210102.

It is not an unprimeable number, because it can be changed into a prime (1223221210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220871 + ... + 1579628.

It is an arithmetic number, because the mean of its divisors is an integer number (153591652500).

Almost surely, 2^{1223221210121} is an apocalyptic number.

It is an amenable number.

1223221210121 is a deficient number, since it is larger than the sum of its proper divisors (5512009879).

1223221210121 is a wasteful number, since it uses less digits than its factorization.

1223221210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803559.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1223221210121 its reverse (1210121223221), we get a palindrome (2433342433342).

The spelling of 1223221210121 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".