210121003012 has 12 divisors (see below), whose sum is σ = 380391471180. Its totient is φ = 101437725536.

The previous prime is 210121002989. The next prime is 210121003019. The reversal of 210121003012 is 210300121012.

It can be written as a sum of positive squares in 2 ways, for example, as 89582884416 + 120538118596 = 299304^2 + 347186^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210121002983 and 210121003001.

It is not an unprimeable number, because it can be changed into a prime (210121003019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905693863 + ... + 905694094.

It is an arithmetic number, because the mean of its divisors is an integer number (31699289265).

Almost surely, 2^210121003012 is an apocalyptic number.

It is an amenable number.

210121003012 is a deficient number, since it is larger than the sum of its proper divisors (170270468168).

210121003012 is a wasteful number, since it uses less digits than its factorization.

210121003012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811387990 (or 1811387988 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210121003012 its reverse (210300121012), we get a palindrome (420421124024).

The spelling of 210121003012 in words is "two hundred ten billion, one hundred twenty-one million, three thousand, twelve".