2021200120020 has 48 divisors (see below), whose sum is σ = 5661451430208. Its totient is φ = 538787546880.

The previous prime is 2021200119997. The next prime is 2021200120033. The reversal of 2021200120020 is 200210021202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2021200119978 and 2021200120005.

It is a congruent number.

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, 6059721 + ... + 6384560.

It is an arithmetic number, because the mean of its divisors is an integer number (117946904796).

Almost surely, 2^{2021200120020} is an apocalyptic number.

2021200120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021200120020 is an abundant number, since it is smaller than the sum of its proper divisors (3640251310188).

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

2021200120020 is a wasteful number, since it uses less digits than its factorization.

2021200120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12447000 (or 12446998 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2021200120020 its reverse (200210021202), we get a palindrome (2221410141222).

The spelling of 2021200120020 in words is "two trillion, twenty-one billion, two hundred million, one hundred twenty thousand, twenty".