121102020210 has 64 divisors (see below), whose sum is σ = 297795294720. Its totient is φ = 31499704320.

The previous prime is 121102020209. The next prime is 121102020217. The reversal of 121102020210 is 12020201121.

It is not an unprimeable number, because it can be changed into a prime (121102020217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9734154 + ... + 9746586.

It is an arithmetic number, because the mean of its divisors is an integer number (4653051480).

Almost surely, 2^121102020210 is an apocalyptic number.

121102020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121102020210 is an abundant number, since it is smaller than the sum of its proper divisors (176693274510).

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

121102020210 is a wasteful number, since it uses less digits than its factorization.

121102020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20403.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121102020210 its reverse (12020201121), we get a palindrome (133122221331).

The spelling of 121102020210 in words is "one hundred twenty-one billion, one hundred two million, twenty thousand, two hundred ten".