202120212220220 has 48 divisors (see below), whose sum is σ = 489538862662080. Its totient is φ = 68662593713664.

The previous prime is 202120212220117. The next prime is 202120212220309. The reversal of 202120212220220 is 22022212021202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 202120212220192 and 202120212220201.

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, 6622534289 + ... + 6622564808.

It is an arithmetic number, because the mean of its divisors is an integer number (10198726305460).

Almost surely, 2^{202120212220220} is an apocalyptic number.

202120212220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120212220220 is an abundant number, since it is smaller than the sum of its proper divisors (287418650441860).

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

202120212220220 is a wasteful number, since it uses less digits than its factorization.

202120212220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245099222 (or 13245099220 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 202120212220220 its reverse (22022212021202), we get a palindrome (224142424241422).

The spelling of 202120212220220 in words is "two hundred two trillion, one hundred twenty billion, two hundred twelve million, two hundred twenty thousand, two hundred twenty".