212121120122 has 8 divisors (see below), whose sum is σ = 318246510900. Its totient is φ = 106038949824.

The previous prime is 212121120121. The next prime is 212121120163. The reversal of 212121120122 is 221021121212.

It can be written as a sum of positive squares in 2 ways, for example, as 189365095921 + 22756024201 = 435161^2 + 150851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212121120122.

It is not an unprimeable number, because it can be changed into a prime (212121120121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10792847 + ... + 10812482.

Almost surely, 2^212121120122 is an apocalyptic number.

212121120122 is a deficient number, since it is larger than the sum of its proper divisors (106125390778).

212121120122 is a wasteful number, since it uses less digits than its factorization.

212121120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21610240.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212121120122 its reverse (221021121212), we get a palindrome (433142241334).

The spelling of 212121120122 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-two".