12012123020 has 24 divisors (see below), whose sum is σ = 25231726800. Its totient is φ = 4803655232.

The previous prime is 12012122987. The next prime is 12012123049. The reversal of 12012123020 is 2032121021.

It is a happy number.

It is a super-2 number, since 2×12012123020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12012122986 and 12012123004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10226 + ... + 155334.

It is an arithmetic number, because the mean of its divisors is an integer number (1051321950).

Almost surely, 2^12012123020 is an apocalyptic number.

12012123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012123020 is an abundant number, since it is smaller than the sum of its proper divisors (13219603780).

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

12012123020 is a wasteful number, since it uses less digits than its factorization.

12012123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149257 (or 149255 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12012123020 its reverse (2032121021), we get a palindrome (14044244041).

The spelling of 12012123020 in words is "twelve billion, twelve million, one hundred twenty-three thousand, twenty".