211020220020020 has 48 divisors (see below), whose sum is σ = 443284528599360. Its totient is φ = 84381030649344.

The previous prime is 211020220019929. The next prime is 211020220020079. The reversal of 211020220020020 is 20020022020112.

It is a junction number, because it is equal to n+sod(n) for n = 211020220019977 and 211020220020004.

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, 1292087207 + ... + 1292250513.

It is an arithmetic number, because the mean of its divisors is an integer number (9235094345820).

Almost surely, 2^{211020220020020} is an apocalyptic number.

211020220020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211020220020020 is an abundant number, since it is smaller than the sum of its proper divisors (232264308579340).

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

211020220020020 is a wasteful number, since it uses less digits than its factorization.

211020220020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183632 (or 183630 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 211020220020020 its reverse (20020022020112), we get a palindrome (231040242040132).

The spelling of 211020220020020 in words is "two hundred eleven trillion, twenty billion, two hundred twenty million, twenty thousand, twenty".