121131221212 has 12 divisors (see below), whose sum is σ = 212207824080. Its totient is φ = 60500414336.

The previous prime is 121131221191. The next prime is 121131221243. The reversal of 121131221212 is 212122131121.

It is a self number, because there is not a number n which added to its sum of digits gives 121131221212.

It is a congruent number.

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, 16294888 + ... + 16302319.

It is an arithmetic number, because the mean of its divisors is an integer number (17683985340).

Almost surely, 2^121131221212 is an apocalyptic number.

It is an amenable number.

121131221212 is a deficient number, since it is larger than the sum of its proper divisors (91076602868).

121131221212 is a wasteful number, since it uses less digits than its factorization.

121131221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32598140 (or 32598138 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 121131221212 its reverse (212122131121), we get a palindrome (333253352333).

Subtracting 121131221212 from its reverse (212122131121), we obtain a palindrome (90990909909).

The spelling of 121131221212 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred twelve".