20012021212180 has 12 divisors (see below), whose sum is σ = 42025244545620. Its totient is φ = 8004808484864.

The previous prime is 20012021212111. The next prime is 20012021212181. The reversal of 20012021212180 is 8121212021002.

It can be written as a sum of positive squares in 2 ways, for example, as 15007163192464 + 5004858019716 = 3873908^2 + 2237154^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012021212181) by changing a digit.

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, 500300530285 + ... + 500300530324.

It is an arithmetic number, because the mean of its divisors is an integer number (3502103712135).

Almost surely, 2^{20012021212180} is an apocalyptic number.

20012021212180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012021212180 is an abundant number, since it is smaller than the sum of its proper divisors (22013223333440).

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

20012021212180 is a wasteful number, since it uses less digits than its factorization.

20012021212180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000601060618 (or 1000601060616 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 20012021212180 its reverse (8121212021002), we get a palindrome (28133233233182).

The spelling of 20012021212180 in words is "twenty trillion, twelve billion, twenty-one million, two hundred twelve thousand, one hundred eighty".