210212122122122 has 4 divisors (see below), whose sum is σ = 315318183183186. Its totient is φ = 105106061061060.

The previous prime is 210212122122113. The next prime is 210212122122157. The reversal of 210212122122122 is 221221221212012.

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., 109287976819921 + 100924145302201 = 10454089^2 + 10046101^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52553030530529 + ... + 52553030530532.

Almost surely, 2^{210212122122122} is an apocalyptic number.

210212122122122 is a deficient number, since it is larger than the sum of its proper divisors (105106061061064).

210212122122122 is a wasteful number, since it uses less digits than its factorization.

210212122122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105106061061063.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 210212122122122 its reverse (221221221212012), we get a palindrome (431433343334134).

The spelling of 210212122122122 in words is "two hundred ten trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-two".