12120420112 has 40 divisors (see below), whose sum is σ = 24730138400. Its totient is φ = 5738729472.

The previous prime is 12120420073. The next prime is 12120420119. The reversal of 12120420112 is 21102402121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (12120420119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810043 + ... + 824869.

It is an arithmetic number, because the mean of its divisors is an integer number (618253460).

Almost surely, 2^12120420112 is an apocalyptic number.

It is an amenable number.

12120420112 is an abundant number, since it is smaller than the sum of its proper divisors (12609718288).

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

12120420112 is a wasteful number, since it uses less digits than its factorization.

12120420112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17543 (or 17537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12120420112 its reverse (21102402121), we get a palindrome (33222822233).

The spelling of 12120420112 in words is "twelve billion, one hundred twenty million, four hundred twenty thousand, one hundred twelve".