12215442333531 has 32 divisors (see below), whose sum is σ = 17169569657856. Its totient is φ = 7716601568000.

The previous prime is 12215442333509. The next prime is 12215442333533. The reversal of 12215442333531 is 13533324451221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12215442333531 - 2¹⁸ = 12215442071387 is a prime.

It is a super-2 number, since 2×12215442333531² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12215442333531.

It is not an unprimeable number, because it can be changed into a prime (12215442333533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7307700 + ... + 8822321.

It is an arithmetic number, because the mean of its divisors is an integer number (536549051808).

Almost surely, 2^{12215442333531} is an apocalyptic number.

12215442333531 is a deficient number, since it is larger than the sum of its proper divisors (4954127324325).

12215442333531 is a wasteful number, since it uses less digits than its factorization.

12215442333531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130243.

The product of its digits is 259200, while the sum is 39.

Adding to 12215442333531 its reverse (13533324451221), we get a palindrome (25748766784752).

The spelling of 12215442333531 in words is "twelve trillion, two hundred fifteen billion, four hundred forty-two million, three hundred thirty-three thousand, five hundred thirty-one".