12135443100 has 144 divisors (see below), whose sum is σ = 38410458240. Its totient is φ = 2933740800.

The previous prime is 12135443087. The next prime is 12135443119. The reversal of 12135443100 is 134453121.

It is a happy number.

It is a super-2 number, since 2×12135443100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1225971 + ... + 1235829.

Almost surely, 2^12135443100 is an apocalyptic number.

12135443100 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 12135443100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19205229120).

12135443100 is an abundant number, since it is smaller than the sum of its proper divisors (26275015140).

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

12135443100 is a wasteful number, since it uses less digits than its factorization.

12135443100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10260 (or 10253 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12135443100 its reverse (134453121), we get a palindrome (12269896221).

The spelling of 12135443100 in words is "twelve billion, one hundred thirty-five million, four hundred forty-three thousand, one hundred".