12021021212 has 48 divisors (see below), whose sum is σ = 21517629504. Its totient is φ = 5875200000.

The previous prime is 12021021203. The next prime is 12021021253. The reversal of 12021021212 is 21212012021.

It is a congruent 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, 11773262 + ... + 11774282.

It is an arithmetic number, because the mean of its divisors is an integer number (448283948).

Almost surely, 2^12021021212 is an apocalyptic number.

It is an amenable number.

12021021212 is a deficient number, since it is larger than the sum of its proper divisors (9496608292).

12021021212 is a wasteful number, since it uses less digits than its factorization.

12021021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1468 counting only the distinct ones).

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

Adding to 12021021212 its reverse (21212012021), we get a palindrome (33233033233).

The spelling of 12021021212 in words is "twelve billion, twenty-one million, twenty-one thousand, two hundred twelve".