20201212220020 has 48 divisors (see below), whose sum is σ = 45686362434048. Its totient is φ = 7458820306560.

The previous prime is 20201212219949. The next prime is 20201212220129. The reversal of 20201212220020 is 2002221210202.

It is a junction number, because it is equal to n+sod(n) for n = 20201212219976 and 20201212220003.

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, 23869915 + ... + 24701725.

It is an arithmetic number, because the mean of its divisors is an integer number (951799217376).

Almost surely, 2^{20201212220020} is an apocalyptic number.

20201212220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201212220020 is an abundant number, since it is smaller than the sum of its proper divisors (25485150214028).

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

20201212220020 is a wasteful number, since it uses less digits than its factorization.

20201212220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925240 (or 925238 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20201212220020 its reverse (2002221210202), we get a palindrome (22203433430222).

The spelling of 20201212220020 in words is "twenty trillion, two hundred one billion, two hundred twelve million, two hundred twenty thousand, twenty".