12021221210 has 16 divisors (see below), whose sum is σ = 21640608000. Its totient is φ = 4807952976.

The previous prime is 12021221209. The next prime is 12021221231. The reversal of 12021221210 is 1212212021.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34691 + ... + 158889.

It is an arithmetic number, because the mean of its divisors is an integer number (1352538000).

Almost surely, 2^12021221210 is an apocalyptic number.

12021221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021221210 is a deficient number, since it is larger than the sum of its proper divisors (9619386790).

12021221210 is a wasteful number, since it uses less digits than its factorization.

12021221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133885.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12021221210 its reverse (1212212021), we get a palindrome (13233433231).

The spelling of 12021221210 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, two hundred ten".