2021222020020 has 72 divisors (see below), whose sum is σ = 6583408874784. Its totient is φ = 461993603904.

The previous prime is 2021222019979. The next prime is 2021222020039. The reversal of 2021222020020 is 200202221202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343742302 + ... + 343748181.

It is an arithmetic number, because the mean of its divisors is an integer number (91436234372).

Almost surely, 2^{2021222020020} is an apocalyptic number.

2021222020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021222020020 is an abundant number, since it is smaller than the sum of its proper divisors (4562186854764).

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

2021222020020 is a wasteful number, since it uses less digits than its factorization.

2021222020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687490509 (or 687490500 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 2021222020020 its reverse (200202221202), we get a palindrome (2221424241222).

The spelling of 2021222020020 in words is "two trillion, twenty-one billion, two hundred twenty-two million, twenty thousand, twenty".