12021212210 has 48 divisors (see below), whose sum is σ = 26269631424. Its totient is φ = 3879107328.

The previous prime is 12021212141. The next prime is 12021212213. The reversal of 12021212210 is 1221212021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (12021212213) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 276884 + ... + 317343.

It is an arithmetic number, because the mean of its divisors is an integer number (547283988).

Almost surely, 2^12021212210 is an apocalyptic number.

12021212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021212210 is an abundant number, since it is smaller than the sum of its proper divisors (14248419214).

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

12021212210 is a wasteful number, since it uses less digits than its factorization.

12021212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594275 (or 594258 counting only the distinct ones).

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

Adding to 12021212210 its reverse (1221212021), we get a palindrome (13242424231).

The spelling of 12021212210 in words is "twelve billion, twenty-one million, two hundred twelve thousand, two hundred ten".