12125145340 has 96 divisors (see below), whose sum is σ = 32840640000. Its totient is φ = 3648933120.

The previous prime is 12125145337. The next prime is 12125145341. The reversal of 12125145340 is 4354152121.

It is a super-2 number, since 2×12125145340² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12125145299 and 12125145308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125145341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91090 + ... + 180409.

It is an arithmetic number, because the mean of its divisors is an integer number (342090000).

Almost surely, 2^12125145340 is an apocalyptic number.

12125145340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12125145340 is an abundant number, since it is smaller than the sum of its proper divisors (20715494660).

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

12125145340 is a wasteful number, since it uses less digits than its factorization.

12125145340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271555 (or 271553 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 12125145340 its reverse (4354152121), we get a palindrome (16479297461).

The spelling of 12125145340 in words is "twelve billion, one hundred twenty-five million, one hundred forty-five thousand, three hundred forty".