12121011212 has 24 divisors (see below), whose sum is σ = 21784911120. Its totient is φ = 5898785600.

The previous prime is 12121011173. The next prime is 12121011223. The reversal of 12121011212 is 21211012121.

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, 230423 + ... + 278094.

It is an arithmetic number, because the mean of its divisors is an integer number (907704630).

Almost surely, 2^12121011212 is an apocalyptic number.

It is an amenable number.

12121011212 is a deficient number, since it is larger than the sum of its proper divisors (9663899908).

12121011212 is a wasteful number, since it uses less digits than its factorization.

12121011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508681 (or 508679 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121011212 its reverse (21211012121), we get a palindrome (33332023333).

Subtracting 12121011212 from its reverse (21211012121), we obtain a palindrome (9090000909).

The spelling of 12121011212 in words is "twelve billion, one hundred twenty-one million, eleven thousand, two hundred twelve".