210001220122 has 4 divisors (see below), whose sum is σ = 315001830186. Its totient is φ = 105000610060.

The previous prime is 210001220111. The next prime is 210001220129. The reversal of 210001220122 is 221022100012.

It is a happy number.

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., 199022162161 + 10979057961 = 446119^2 + 104781^2 .

It is not an unprimeable number, because it can be changed into a prime (210001220129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52500305029 + ... + 52500305032.

Almost surely, 2^210001220122 is an apocalyptic number.

210001220122 is a deficient number, since it is larger than the sum of its proper divisors (105000610064).

210001220122 is a wasteful number, since it uses less digits than its factorization.

210001220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105000610063.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210001220122 its reverse (221022100012), we get a palindrome (431023320134).

The spelling of 210001220122 in words is "two hundred ten billion, one million, two hundred twenty thousand, one hundred twenty-two".