2021012345124 has 72 divisors (see below), whose sum is σ = 5380947411840. Its totient is φ = 637810915392.

The previous prime is 2021012345123. The next prime is 2021012345167. The reversal of 2021012345124 is 4215432101202.

2021012345124 is a `hidden beast` number, since 2 + 0 + 21 + 0 + 123 + 4 + 512 + 4 = 666.

It is a super-2 number, since 2×2021012345124² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021012345123) 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 23 ways as a sum of consecutive naturals, for example, 149514 + ... + 2016030.

It is an arithmetic number, because the mean of its divisors is an integer number (74735380720).

Almost surely, 2^{2021012345124} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021012345124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2690473705920).

2021012345124 is an abundant number, since it is smaller than the sum of its proper divisors (3359935066716).

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

2021012345124 is a wasteful number, since it uses less digits than its factorization.

2021012345124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868129 (or 1868124 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 2021012345124 its reverse (4215432101202), we get a palindrome (6236444446326).

The spelling of 2021012345124 in words is "two trillion, twenty-one billion, twelve million, three hundred forty-five thousand, one hundred twenty-four".