210211201022122 has 4 divisors (see below), whose sum is σ = 315316801533186. Its totient is φ = 105105600511060.

The previous prime is 210211201022033. The next prime is 210211201022159. The reversal of 210211201022122 is 221220102112012.

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., 205275565608481 + 4935635413641 = 14327441^2 + 2221629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210211201022122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52552800255529 + ... + 52552800255532.

Almost surely, 2^{210211201022122} is an apocalyptic number.

210211201022122 is a deficient number, since it is larger than the sum of its proper divisors (105105600511064).

210211201022122 is a wasteful number, since it uses less digits than its factorization.

210211201022122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105105600511063.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210211201022122 its reverse (221220102112012), we get a palindrome (431431303134134).

The spelling of 210211201022122 in words is "two hundred ten trillion, two hundred eleven billion, two hundred one million, twenty-two thousand, one hundred twenty-two".