12021020210 has 8 divisors (see below), whose sum is σ = 21637836396. Its totient is φ = 4808408080.

The previous prime is 12021020197. The next prime is 12021020239. The reversal of 12021020210 is 1202012021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9733598281 + 2287421929 = 98659^2 + 47827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12021020191 and 12021020200.

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, 601051001 + ... + 601051020.

Almost surely, 2^12021020210 is an apocalyptic number.

12021020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021020210 is a deficient number, since it is larger than the sum of its proper divisors (9616816186).

12021020210 is a wasteful number, since it uses less digits than its factorization.

12021020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202102028.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12021020210 its reverse (1202012021), we get a palindrome (13223032231).

The spelling of 12021020210 in words is "twelve billion, twenty-one million, twenty thousand, two hundred ten".