121212110120 has 16 divisors (see below), whose sum is σ = 272727247860. Its totient is φ = 48484844032.

The previous prime is 121212110111. The next prime is 121212110177. The reversal of 121212110120 is 21011212121.

It can be written as a sum of positive squares in 2 ways, for example, as 109279169476 + 11932940644 = 330574^2 + 109238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121212110095 and 121212110104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515151337 + ... + 1515151416.

Almost surely, 2^121212110120 is an apocalyptic number.

121212110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212110120 is an abundant number, since it is smaller than the sum of its proper divisors (151515137740).

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

121212110120 is a wasteful number, since it uses less digits than its factorization.

121212110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030302764 (or 3030302760 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121212110120 its reverse (21011212121), we get a palindrome (142223322241).

The spelling of 121212110120 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, one hundred twenty".