212220202120 has 64 divisors (see below), whose sum is σ = 483747260400. Its totient is φ = 83781964800.

The previous prime is 212220202097. The next prime is 212220202123. The reversal of 212220202120 is 21202022212.

It can be written as a sum of positive squares in 8 ways, for example, as 131039656036 + 81180546084 = 361994^2 + 284922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212220202094 and 212220202103.

It is not an unprimeable number, because it can be changed into a prime (212220202123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1197826 + ... + 1363534.

Almost surely, 2^212220202120 is an apocalyptic number.

212220202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212220202120 is an abundant number, since it is smaller than the sum of its proper divisors (271527058280).

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

212220202120 is a wasteful number, since it uses less digits than its factorization.

212220202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166138 (or 166134 counting only the distinct ones).

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

Adding to 212220202120 its reverse (21202022212), we get a palindrome (233422224332).

The spelling of 212220202120 in words is "two hundred twelve billion, two hundred twenty million, two hundred two thousand, one hundred twenty".