12120121000 has 64 divisors (see below), whose sum is σ = 30542737680. Its totient is φ = 4475116800.

The previous prime is 12120120983. The next prime is 12120121121. The reversal of 12120121000 is 12102121.

12120121000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 589227076 + 11530893924 = 24274^2 + 107382^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 453159 + ... + 479158.

Almost surely, 2^12120121000 is an apocalyptic number.

12120121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120121000 is an abundant number, since it is smaller than the sum of its proper divisors (18422616680).

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

12120121000 is a wasteful number, since it uses less digits than its factorization.

12120121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932351 (or 932337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12120121000 its reverse (12102121), we get a palindrome (12132223121).

The spelling of 12120121000 in words is "twelve billion, one hundred twenty million, one hundred twenty-one thousand".