212210210020122 has 24 divisors (see below), whose sum is σ = 459851799321876. Its totient is φ = 70727042681856.

The previous prime is 212210210020121. The next prime is 212210210020163. The reversal of 212210210020122 is 221020012012212.

It is a happy number.

212210210020122 is a `hidden beast` number, since 21 + 2 + 210 + 210 + 0 + 201 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 210700872460521 + 1509337559601 = 14515539^2 + 1228551^2 .

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 = 212210210020095 and 212210210020104.

It is not an unprimeable number, because it can be changed into a prime (212210210020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807697633 + ... + 807960324.

Almost surely, 2^{212210210020122} is an apocalyptic number.

212210210020122 is an abundant number, since it is smaller than the sum of its proper divisors (247641589301754).

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

212210210020122 is a wasteful number, since it uses less digits than its factorization.

212210210020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615665262 (or 1615665259 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212210210020122 its reverse (221020012012212), we get a palindrome (433230222032334).

The spelling of 212210210020122 in words is "two hundred twelve trillion, two hundred ten billion, two hundred ten million, twenty thousand, one hundred twenty-two".