12401103520 has 96 divisors (see below), whose sum is σ = 32404207248. Its totient is φ = 4455088128.

The previous prime is 12401103493. The next prime is 12401103523. The reversal of 12401103520 is 2530110421.

It can be written as a sum of positive squares in 8 ways, for example, as 9109557136 + 3291546384 = 95444^2 + 57372^2 .

It is not an unprimeable number, because it can be changed into a prime (12401103523) 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, 3609 + ... + 157528.

Almost surely, 2^12401103520 is an apocalyptic number.

12401103520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12401103520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16202103624).

12401103520 is an abundant number, since it is smaller than the sum of its proper divisors (20003103728).

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

12401103520 is a wasteful number, since it uses less digits than its factorization.

12401103520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161202 (or 161194 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 12401103520 its reverse (2530110421), we get a palindrome (14931213941).

It can be divided in two parts, 12401 and 103520, that added together give a triangular number (115921 = T₄₈₁).

The spelling of 12401103520 in words is "twelve billion, four hundred one million, one hundred three thousand, five hundred twenty".