210121212121122 has 16 divisors (see below), whose sum is σ = 420357780427680. Its totient is φ = 70021178009472.

The previous prime is 210121212121087. The next prime is 210121212121193. The reversal of 210121212121122 is 221121212121012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4806484047 + ... + 4806527762.

It is an arithmetic number, because the mean of its divisors is an integer number (26272361276730).

Almost surely, 2^{210121212121122} is an apocalyptic number.

210121212121122 is an abundant number, since it is smaller than the sum of its proper divisors (210236568306558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121212121122 is a wasteful number, since it uses less digits than its factorization.

210121212121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613015457.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 210121212121122 its reverse (221121212121012), we get a palindrome (431242424242134).

The spelling of 210121212121122 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twenty-two".