12078515220 has 96 divisors (see below), whose sum is σ = 34067392128. Its totient is φ = 3197440512.

The previous prime is 12078515219. The next prime is 12078515233. The reversal of 12078515220 is 2251587021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7244827 + ... + 7246493.

It is an arithmetic number, because the mean of its divisors is an integer number (354868668).

Almost surely, 2^12078515220 is an apocalyptic number.

12078515220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12078515220 is an abundant number, since it is smaller than the sum of its proper divisors (21988876908).

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

12078515220 is a wasteful number, since it uses less digits than its factorization.

12078515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489 (or 2487 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The spelling of 12078515220 in words is "twelve billion, seventy-eight million, five hundred fifteen thousand, two hundred twenty".