12100321020 has 48 divisors (see below), whose sum is σ = 33934699008. Its totient is φ = 3221628480.

The previous prime is 12100320941. The next prime is 12100321039. The reversal of 12100321020 is 2012300121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12100320987 and 12100321005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121944 + ... + 197663.

It is an arithmetic number, because the mean of its divisors is an integer number (706972896).

Almost surely, 2^12100321020 is an apocalyptic number.

12100321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100321020 is an abundant number, since it is smaller than the sum of its proper divisors (21834377988).

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

12100321020 is a wasteful number, since it uses less digits than its factorization.

12100321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320250 (or 320248 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12100321020 its reverse (2012300121), we get a palindrome (14112621141).

The spelling of 12100321020 in words is "twelve billion, one hundred million, three hundred twenty-one thousand, twenty".