121212020120 has 16 divisors (see below), whose sum is σ = 272727045360. Its totient is φ = 48484808032.

The previous prime is 121212020081. The next prime is 121212020123. The reversal of 121212020120 is 21020212121.

It is a junction number, because it is equal to n+sod(n) for n = 121212020095 and 121212020104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212020123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515150212 + ... + 1515150291.

It is an arithmetic number, because the mean of its divisors is an integer number (17045440335).

Almost surely, 2^121212020120 is an apocalyptic number.

121212020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212020120 is an abundant number, since it is smaller than the sum of its proper divisors (151515025240).

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

121212020120 is a wasteful number, since it uses less digits than its factorization.

121212020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030300514 (or 3030300510 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121212020120 its reverse (21020212121), we get a palindrome (142232232241).

The spelling of 121212020120 in words is "one hundred twenty-one billion, two hundred twelve million, twenty thousand, one hundred twenty".