12155122040 has 16 divisors (see below), whose sum is σ = 27349024680. Its totient is φ = 4862048800.

The previous prime is 12155121947. The next prime is 12155122061. The reversal of 12155122040 is 4022155121.

It is a junction number, because it is equal to n+sod(n) for n = 12155121997 and 12155122015.

It is a congruent number.

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, 151938986 + ... + 151939065.

Almost surely, 2^12155122040 is an apocalyptic number.

12155122040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155122040 is an abundant number, since it is smaller than the sum of its proper divisors (15193902640).

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

12155122040 is a wasteful number, since it uses less digits than its factorization.

12155122040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303878062 (or 303878058 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12155122040 its reverse (4022155121), we get a palindrome (16177277161).

The spelling of 12155122040 in words is "twelve billion, one hundred fifty-five million, one hundred twenty-two thousand, forty".