1221124303145 has 8 divisors (see below), whose sum is σ = 1465476092160. Its totient is φ = 976814823600.

The previous prime is 1221124303141. The next prime is 1221124303159. The reversal of 1221124303145 is 5413034211221.

It is a happy number.

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

It is not a de Polignac number, because 1221124303145 - 2² = 1221124303141 is a prime.

It is a super-2 number, since 2×1221124303145² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221124303141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10513835 + ... + 10629344.

It is an arithmetic number, because the mean of its divisors is an integer number (183184511520).

Almost surely, 2^{1221124303145} is an apocalyptic number.

It is an amenable number.

1221124303145 is a deficient number, since it is larger than the sum of its proper divisors (244351789015).

1221124303145 is a wasteful number, since it uses less digits than its factorization.

1221124303145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21154735.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 1221124303145 its reverse (5413034211221), we get a palindrome (6634158514366).

The spelling of 1221124303145 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-four million, three hundred three thousand, one hundred forty-five".