212101212122 has 4 divisors (see below), whose sum is σ = 318151818186. Its totient is φ = 106050606060.

The previous prime is 212101212083. The next prime is 212101212131. The reversal of 212101212122 is 221212101212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 156088996561 + 56012215561 = 395081^2 + 236669^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212101212122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53025303029 + ... + 53025303032.

Almost surely, 2^212101212122 is an apocalyptic number.

212101212122 is a deficient number, since it is larger than the sum of its proper divisors (106050606064).

212101212122 is a wasteful number, since it uses less digits than its factorization.

212101212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106050606063.

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

Adding to 212101212122 its reverse (221212101212), we get a palindrome (433313313334).

The spelling of 212101212122 in words is "two hundred twelve billion, one hundred one million, two hundred twelve thousand, one hundred twenty-two".