12215242121453 has 16 divisors (see below), whose sum is σ = 14262671283840. Its totient is φ = 10245837229056.

The previous prime is 12215242121449. The next prime is 12215242121507. The reversal of 12215242121453 is 35412124251221.

It is a cyclic number.

It is not a de Polignac number, because 12215242121453 - 2² = 12215242121449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215242121413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101007251 + ... + 101128112.

It is an arithmetic number, because the mean of its divisors is an integer number (891416955240).

Almost surely, 2^{12215242121453} is an apocalyptic number.

It is an amenable number.

12215242121453 is a deficient number, since it is larger than the sum of its proper divisors (2047429162387).

12215242121453 is an equidigital number, since it uses as much as digits as its factorization.

12215242121453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202135556.

The product of its digits is 38400, while the sum is 35.

Adding to 12215242121453 its reverse (35412124251221), we get a palindrome (47627366372674).

The spelling of 12215242121453 in words is "twelve trillion, two hundred fifteen billion, two hundred forty-two million, one hundred twenty-one thousand, four hundred fifty-three".