2021331020 has 24 divisors (see below), whose sum is σ = 4273290000. Its totient is φ = 803104832.

The previous prime is 2021331007. The next prime is 2021331029. The reversal of 2021331020 is 201331202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021330986 and 2021331004.

It is not an unprimeable number, because it can be changed into a prime (2021331029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336170 + ... + 342129.

It is an arithmetic number, because the mean of its divisors is an integer number (178053750).

Almost surely, 2^2021331020 is an apocalyptic number.

2021331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021331020 is an abundant number, since it is smaller than the sum of its proper divisors (2251958980).

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

2021331020 is a wasteful number, since it uses less digits than its factorization.

2021331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678457 (or 678455 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2021331020 is about 44959.2150732194. The cubic root of 2021331020 is about 1264.3844526683.

Adding to 2021331020 its reverse (201331202), we get a palindrome (2222662222).

The spelling of 2021331020 in words is "two billion, twenty-one million, three hundred thirty-one thousand, twenty".