1221153152005 has 8 divisors (see below), whose sum is σ = 1466299084824.
Its totient is φ = 976312320000.
The previous prime is 1221153152003. The next prime is 1221153152047. The reversal of 1221153152005 is 5002513511221.
Adding to 1221153152005 its reverse (5002513511221), we get a palindrome (6223666663226).
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 948771454401 + 272381697604 = 974049^2 + 521902^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 1221153152005 - 21 = 1221153152003 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1221153152003) 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, 76266396 + ... + 76282405.
It is an arithmetic number, because the mean of its divisors is an integer number (183287385603).
Almost surely, 21221153152005 is an apocalyptic number.
It is an amenable number.
1221153152005 is a deficient number, since it is larger than the sum of its proper divisors (245145932819).
1221153152005 is a wasteful number, since it uses less digits than its factorization.
1221153152005 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 152550407.
The product of its (nonzero) digits is 3000, while the sum is 28.
The spelling of 1221153152005 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-three million, one hundred fifty-two thousand, five".