12102121020020 has 24 divisors (see below), whose sum is σ = 25414528612200. Its totient is φ = 4840834223232.

The previous prime is 12102121019983. The next prime is 12102121020029. The reversal of 12102121020020 is 2002012120121.

It can be written as a sum of positive squares in 4 ways, for example, as 699491358736 + 11402629661284 = 836356^2 + 3376778^2 .

It is a super-2 number, since 2×12102121020020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12102121019977 and 12102121020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102121020029) 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, 8569466 + ... + 9881294.

It is an arithmetic number, because the mean of its divisors is an integer number (1058938692175).

Almost surely, 2^{12102121020020} is an apocalyptic number.

12102121020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102121020020 is an abundant number, since it is smaller than the sum of its proper divisors (13312407592180).

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

12102121020020 is a wasteful number, since it uses less digits than its factorization.

12102121020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773107 (or 1773105 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12102121020020 its reverse (2002012120121), we get a palindrome (14104133140141).

The spelling of 12102121020020 in words is "twelve trillion, one hundred two billion, one hundred twenty-one million, twenty thousand, twenty".