12235311520 has 24 divisors (see below), whose sum is σ = 28905923844. Its totient is φ = 4894124544.

The previous prime is 12235311493. The next prime is 12235311559. The reversal of 12235311520 is 2511353221.

It can be written as a sum of positive squares in 2 ways, for example, as 11734088976 + 501222544 = 108324^2 + 22388^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38235189 + ... + 38235508.

Almost surely, 2^12235311520 is an apocalyptic number.

12235311520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12235311520 is an abundant number, since it is smaller than the sum of its proper divisors (16670612324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12235311520 is an equidigital number, since it uses as much as digits as its factorization.

12235311520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76470712 (or 76470704 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 12235311520 its reverse (2511353221), we get a palindrome (14746664741).

The spelling of 12235311520 in words is "twelve billion, two hundred thirty-five million, three hundred eleven thousand, five hundred twenty".