121121212102110 has 144 divisors (see below), whose sum is σ = 355501715613408. Its totient is φ = 28569131015040.

The previous prime is 121121212102067. The next prime is 121121212102307. The reversal of 121121212102110 is 11201212121121.

It is a happy number.

121121212102110 is a `hidden beast` number, since 1 + 211 + 21 + 212 + 10 + 211 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 149897634 + ... + 150703493.

It is an arithmetic number, because the mean of its divisors is an integer number (2468761913982).

Almost surely, 2^{121121212102110} is an apocalyptic number.

121121212102110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121212102110 is an abundant number, since it is smaller than the sum of its proper divisors (234380503511298).

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

121121212102110 is a wasteful number, since it uses less digits than its factorization.

121121212102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300601199 (or 300601185 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121121212102110 its reverse (11201212121121), we get a palindrome (132322424223231).

The spelling of 121121212102110 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred two thousand, one hundred ten".