2021123829812 has 12 divisors (see below), whose sum is σ = 3543755509476. Its totient is φ = 1008622255680.

The previous prime is 2021123829793. The next prime is 2021123829827. The reversal of 2021123829812 is 2189283211202.

It can be written as a sum of positive squares in 2 ways, for example, as 1313513119396 + 707610710416 = 1146086^2 + 841196^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021123829812.

It is a congruent number.

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, 484912463 + ... + 484916630.

It is an arithmetic number, because the mean of its divisors is an integer number (295312959123).

Almost surely, 2^{2021123829812} is an apocalyptic number.

It is an amenable number.

2021123829812 is a deficient number, since it is larger than the sum of its proper divisors (1522631679664).

2021123829812 is a wasteful number, since it uses less digits than its factorization.

2021123829812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969829618 (or 969829616 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 2021123829812 in words is "two trillion, twenty-one billion, one hundred twenty-three million, eight hundred twenty-nine thousand, eight hundred twelve".