2021312100420 has 72 divisors (see below), whose sum is σ = 6154626494016. Its totient is φ = 536967054912.

The previous prime is 2021312100419. The next prime is 2021312100443. The reversal of 2021312100420 is 240012131202.

It is a happy number.

2021312100420 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 31 + 210 + 0 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2021312100393 and 2021312100402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21301542 + ... + 21396221.

It is an arithmetic number, because the mean of its divisors is an integer number (85480923528).

Almost surely, 2^{2021312100420} is an apocalyptic number.

2021312100420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021312100420 is an abundant number, since it is smaller than the sum of its proper divisors (4133314393596).

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

2021312100420 is a wasteful number, since it uses less digits than its factorization.

2021312100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42698041 (or 42698036 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2021312100420 its reverse (240012131202), we get a palindrome (2261324231622).

The spelling of 2021312100420 in words is "two trillion, twenty-one billion, three hundred twelve million, one hundred thousand, four hundred twenty".