120121212 has 12 divisors (see below), whose sum is σ = 280282856. Its totient is φ = 40040400.

The previous prime is 120121207. The next prime is 120121229. The reversal of 120121212 is 212121021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 10010101 = 120121212 / (1 + 2 + 0 + 1 + 2 + 1 + 2 + 1 + 2).

120121212 is a modest number, since divided by 121212 gives 120 as remainder.

It is a congruent number.

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, 5005039 + ... + 5005062.

Almost surely, 2^120121212 is an apocalyptic number.

120121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

120121212 is an abundant number, since it is smaller than the sum of its proper divisors (160161644).

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

120121212 is a wasteful number, since it uses less digits than its factorization.

120121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010108 (or 10010106 counting only the distinct ones).

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

The square root of 120121212 is about 10959.9822992558. The cubic root of 120121212 is about 493.4084337012.

Adding to 120121212 its reverse (212121021), we get a palindrome (332242233).

The spelling of 120121212 in words is "one hundred twenty million, one hundred twenty-one thousand, two hundred twelve".