2021321031020 has 12 divisors (see below), whose sum is σ = 4244774165184. Its totient is φ = 808528412400.

The previous prime is 2021321031017. The next prime is 2021321031031. The reversal of 2021321031020 is 201301231202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021321031020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50533025756 + ... + 50533025795.

It is an arithmetic number, because the mean of its divisors is an integer number (353731180432).

Almost surely, 2^{2021321031020} is an apocalyptic number.

2021321031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021321031020 is an abundant number, since it is smaller than the sum of its proper divisors (2223453134164).

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

2021321031020 is a wasteful number, since it uses less digits than its factorization.

2021321031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101066051560 (or 101066051558 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2021321031020 its reverse (201301231202), we get a palindrome (2222622262222).

The spelling of 2021321031020 in words is "two trillion, twenty-one billion, three hundred twenty-one million, thirty-one thousand, twenty".