1221153152011 has 8 divisors (see below), whose sum is σ = 1315222107584. Its totient is φ = 1127103353280.

The previous prime is 1221153152003. The next prime is 1221153152047. The reversal of 1221153152011 is 1102513511221.

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 1221153152011 - 2³ = 1221153152003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221153152071) 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, 4656675 + ... + 4911916.

It is an arithmetic number, because the mean of its divisors is an integer number (164402763448).

Almost surely, 2^{1221153152011} is an apocalyptic number.

1221153152011 is a deficient number, since it is larger than the sum of its proper divisors (94068955573).

1221153152011 is an equidigital number, since it uses as much as digits as its factorization.

1221153152011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578421.

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 1221153152011 its reverse (1102513511221), we get a palindrome (2323666663232).

The spelling of 1221153152011 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-three million, one hundred fifty-two thousand, eleven".