20021210211020 has 12 divisors (see below), whose sum is σ = 42044541443184. Its totient is φ = 8008484084400.

The previous prime is 20021210210959. The next prime is 20021210211047. The reversal of 20021210211020 is 2011201212002.

It is a junction number, because it is equal to n+sod(n) for n = 20021210210986 and 20021210211004.

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, 500530255256 + ... + 500530255295.

It is an arithmetic number, because the mean of its divisors is an integer number (3503711786932).

Almost surely, 2^{20021210211020} is an apocalyptic number.

20021210211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021210211020 is an abundant number, since it is smaller than the sum of its proper divisors (22023331232164).

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

20021210211020 is a wasteful number, since it uses less digits than its factorization.

20021210211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001060510560 (or 1001060510558 counting only the distinct ones).

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

Adding to 20021210211020 its reverse (2011201212002), we get a palindrome (22032411423022).

The spelling of 20021210211020 in words is "twenty trillion, twenty-one billion, two hundred ten million, two hundred eleven thousand, twenty".