2021312104220 has 12 divisors (see below), whose sum is σ = 4244755418904. Its totient is φ = 808524841680.

The previous prime is 2021312104171. The next prime is 2021312104237. The reversal of 2021312104220 is 224012131202.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 101065605211 = 2021312104220 / (2 + 0 + 2 + 1 + 3 + 1 + 2 + 1 + 0 + 4 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2021312104192 and 2021312104201.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 50532802586 + ... + 50532802625.

It is an arithmetic number, because the mean of its divisors is an integer number (353729618242).

Almost surely, 2^{2021312104220} is an apocalyptic number.

2021312104220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021312104220 is an abundant number, since it is smaller than the sum of its proper divisors (2223443314684).

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

2021312104220 is a wasteful number, since it uses less digits than its factorization.

2021312104220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101065605220 (or 101065605218 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2021312104220 its reverse (224012131202), we get a palindrome (2245324235422).

The spelling of 2021312104220 in words is "two trillion, twenty-one billion, three hundred twelve million, one hundred four thousand, two hundred twenty".