212201312122 has 4 divisors (see below), whose sum is σ = 318301968186. Its totient is φ = 106100656060.

The previous prime is 212201312093. The next prime is 212201312123. The reversal of 212201312122 is 221213102212.

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., 211775756481 + 425555641 = 460191^2 + 20629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212201312122.

It is not an unprimeable number, because it can be changed into a prime (212201312123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53050328029 + ... + 53050328032.

Almost surely, 2^212201312122 is an apocalyptic number.

212201312122 is a deficient number, since it is larger than the sum of its proper divisors (106100656064).

212201312122 is a wasteful number, since it uses less digits than its factorization.

212201312122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106100656063.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212201312122 its reverse (221213102212), we get a palindrome (433414414334).

The spelling of 212201312122 in words is "two hundred twelve billion, two hundred one million, three hundred twelve thousand, one hundred twenty-two".