12021122212 has 48 divisors (see below), whose sum is σ = 24540122880. Its totient is φ = 5091776000.

The previous prime is 12021122209. The next prime is 12021122233. The reversal of 12021122212 is 21222112021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4012 + ... + 155107.

It is an arithmetic number, because the mean of its divisors is an integer number (511252560).

Almost surely, 2^12021122212 is an apocalyptic number.

It is an amenable number.

12021122212 is an abundant number, since it is smaller than the sum of its proper divisors (12519000668).

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

12021122212 is a wasteful number, since it uses less digits than its factorization.

12021122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159252 (or 159250 counting only the distinct ones).

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

Adding to 12021122212 its reverse (21222112021), we get a palindrome (33243234233).

The spelling of 12021122212 in words is "twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred twelve".