12232405115551 has 4 divisors (see below), whose sum is σ = 12313414421104. Its totient is φ = 12151395810000.

The previous prime is 12232405115537. The next prime is 12232405115611. The reversal of 12232405115551 is 15551150423221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12232405115551 - 2¹³ = 12232405107359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12232405115551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232405115251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40504652550 + ... + 40504652851.

It is an arithmetic number, because the mean of its divisors is an integer number (3078353605276).

Almost surely, 2^{12232405115551} is an apocalyptic number.

12232405115551 is a deficient number, since it is larger than the sum of its proper divisors (81009305553).

12232405115551 is an equidigital number, since it uses as much as digits as its factorization.

12232405115551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81009305552.

The product of its (nonzero) digits is 60000, while the sum is 37.

Adding to 12232405115551 its reverse (15551150423221), we get a palindrome (27783555538772).

The spelling of 12232405115551 in words is "twelve trillion, two hundred thirty-two billion, four hundred five million, one hundred fifteen thousand, five hundred fifty-one".