20021011212020 has 48 divisors (see below), whose sum is σ = 51746613598848. Its totient is φ = 6336320031360.

The previous prime is 20021011211989. The next prime is 20021011212031. The reversal of 20021011212020 is 2021211012002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20021011211986 and 20021011212004.

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, 5500275986 + ... + 5500279625.

It is an arithmetic number, because the mean of its divisors is an integer number (1078054449976).

Almost surely, 2^{20021011212020} is an apocalyptic number.

20021011212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021011212020 is an abundant number, since it is smaller than the sum of its proper divisors (31725602386828).

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

20021011212020 is a wasteful number, since it uses less digits than its factorization.

20021011212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000555640 (or 11000555638 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021011212020 its reverse (2021211012002), we get a palindrome (22042222224022).

The spelling of 20021011212020 in words is "twenty trillion, twenty-one billion, eleven million, two hundred twelve thousand, twenty".