12121202020 has 12 divisors (see below), whose sum is σ = 25454524284. Its totient is φ = 4848480800.

The previous prime is 12121201997. The next prime is 12121202039. The reversal of 12121202020 is 2020212121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2202237184 + 9918964836 = 46928^2 + 99594^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303030031 + ... + 303030070.

It is an arithmetic number, because the mean of its divisors is an integer number (2121210357).

Almost surely, 2^12121202020 is an apocalyptic number.

12121202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121202020 is an abundant number, since it is smaller than the sum of its proper divisors (13333322264).

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

12121202020 is a wasteful number, since it uses less digits than its factorization.

12121202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606060110 (or 606060108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12121202020 its reverse (2020212121), we get a palindrome (14141414141).

The spelling of 12121202020 in words is "twelve billion, one hundred twenty-one million, two hundred two thousand, twenty".