210212022220020 has 144 divisors (see below), whose sum is σ = 668666868302160. Its totient is φ = 53382136485888.

The previous prime is 210212022219949. The next prime is 210212022220051. The reversal of 210212022220020 is 20022220212012.

210212022220020 is a `hidden beast` number, since 2 + 10 + 212 + 0 + 222 + 200 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 6203476899684 + 204008545320336 = 2490678^2 + 14283156^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210212022219975 and 210212022220002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275444299 + ... + 276206418.

It is an arithmetic number, because the mean of its divisors is an integer number (4643519918765).

Almost surely, 2^{210212022220020} is an apocalyptic number.

210212022220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210212022220020 is an abundant number, since it is smaller than the sum of its proper divisors (458454846082140).

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

210212022220020 is a wasteful number, since it uses less digits than its factorization.

210212022220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551650834 (or 551650829 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 210212022220020 its reverse (20022220212012), we get a palindrome (230234242432032).

The spelling of 210212022220020 in words is "two hundred ten trillion, two hundred twelve billion, twenty-two million, two hundred twenty thousand, twenty".