12102102020 has 24 divisors (see below), whose sum is σ = 26034279768. Its totient is φ = 4722771200.

The previous prime is 12102101983. The next prime is 12102102053. The reversal of 12102102020 is 2020120121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 285542404 + 11816559616 = 16898^2 + 108704^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12102101992 and 12102102010.

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, 7378511 + ... + 7380150.

It is an arithmetic number, because the mean of its divisors is an integer number (1084761657).

Almost surely, 2^12102102020 is an apocalyptic number.

12102102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102102020 is an abundant number, since it is smaller than the sum of its proper divisors (13932177748).

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

12102102020 is a wasteful number, since it uses less digits than its factorization.

12102102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14758711 (or 14758709 counting only the distinct ones).

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

Adding to 12102102020 its reverse (2020120121), we get a palindrome (14122222141).

The spelling of 12102102020 in words is "twelve billion, one hundred two million, one hundred two thousand, twenty".