212101202100122 has 4 divisors (see below), whose sum is σ = 318151803150186. Its totient is φ = 106050601050060.

The previous prime is 212101202100091. The next prime is 212101202100131. The reversal of 212101202100122 is 221001202101212.

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., 190259235315601 + 21841966784521 = 13793449^2 + 4673539^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212101202100122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53025300525029 + ... + 53025300525032.

Almost surely, 2^{212101202100122} is an apocalyptic number.

212101202100122 is a deficient number, since it is larger than the sum of its proper divisors (106050601050064).

212101202100122 is a wasteful number, since it uses less digits than its factorization.

212101202100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106050601050063.

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

Adding to 212101202100122 its reverse (221001202101212), we get a palindrome (433102404201334).

The spelling of 212101202100122 in words is "two hundred twelve trillion, one hundred one billion, two hundred two million, one hundred thousand, one hundred twenty-two".