2021061020520 has 64 divisors (see below), whose sum is σ = 6063933507840. Its totient is φ = 538882899200.

The previous prime is 2021061020519. The next prime is 2021061020549. The reversal of 2021061020520 is 250201601202.

It is a happy number.

It is a super-2 number, since 2×2021061020520² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64911 + ... + 2011550.

It is an arithmetic number, because the mean of its divisors is an integer number (94748961060).

Almost surely, 2^{2021061020520} is an apocalyptic number.

2021061020520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021061020520 is an abundant number, since it is smaller than the sum of its proper divisors (4042872487320).

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

2021061020520 is a wasteful number, since it uses less digits than its factorization.

2021061020520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084586 (or 2084582 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 2021061020520 its reverse (250201601202), we get a palindrome (2271262621722).

The spelling of 2021061020520 in words is "two trillion, twenty-one billion, sixty-one million, twenty thousand, five hundred twenty".