12021000210 has 40 divisors (see below), whose sum is σ = 32323136076. Its totient is φ = 3205599840.

The previous prime is 12021000191. The next prime is 12021000353. The reversal of 12021000210 is 1200012021.

It can be written as a sum of positive squares in 2 ways, for example, as 11912194449 + 108805761 = 109143^2 + 10431^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12021000192 and 12021000201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7419561 + ... + 7421180.

Almost surely, 2^12021000210 is an apocalyptic number.

12021000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021000210 is an abundant number, since it is smaller than the sum of its proper divisors (20302135866).

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

12021000210 is a wasteful number, since it uses less digits than its factorization.

12021000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840760 (or 14840751 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12021000210 its reverse (1200012021), we get a palindrome (13221012231).

The spelling of 12021000210 in words is "twelve billion, twenty-one million, two hundred ten", and thus it is an aban number.