12021421210 has 8 divisors (see below), whose sum is σ = 21638558196. Its totient is φ = 4808568480.

The previous prime is 12021421189. The next prime is 12021421241. The reversal of 12021421210 is 1212412021.

It can be written as a sum of positive squares in 2 ways, for example, as 11807647569 + 213773641 = 108663^2 + 14621^2 .

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

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, 601071051 + ... + 601071070.

Almost surely, 2^12021421210 is an apocalyptic number.

12021421210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021421210 is a deficient number, since it is larger than the sum of its proper divisors (9617136986).

12021421210 is a wasteful number, since it uses less digits than its factorization.

12021421210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202142128.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12021421210 its reverse (1212412021), we get a palindrome (13233833231).

The spelling of 12021421210 in words is "twelve billion, twenty-one million, four hundred twenty-one thousand, two hundred ten".