12102021020 has 12 divisors (see below), whose sum is σ = 25414244184. Its totient is φ = 4840808400.

The previous prime is 12102020999. The next prime is 12102021049. The reversal of 12102021020 is 2012020121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12102020992 and 12102021010.

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, 302550506 + ... + 302550545.

It is an arithmetic number, because the mean of its divisors is an integer number (2117853682).

Almost surely, 2^12102021020 is an apocalyptic number.

12102021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102021020 is an abundant number, since it is smaller than the sum of its proper divisors (13312223164).

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

12102021020 is a wasteful number, since it uses less digits than its factorization.

12102021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605101060 (or 605101058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12102021020 its reverse (2012020121), we get a palindrome (14114041141).

The spelling of 12102021020 in words is "twelve billion, one hundred two million, twenty-one thousand, twenty".