121213211212 has 12 divisors (see below), whose sum is σ = 212125575816. Its totient is φ = 60605903840.

The previous prime is 121213211209. The next prime is 121213211233. The reversal of 121213211212 is 212112312121.

It is a self number, because there is not a number n which added to its sum of digits gives 121213211212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515808 + ... + 713080.

It is an arithmetic number, because the mean of its divisors is an integer number (17677131318).

Almost surely, 2^121213211212 is an apocalyptic number.

It is an amenable number.

121213211212 is a deficient number, since it is larger than the sum of its proper divisors (90912364604).

121213211212 is a wasteful number, since it uses less digits than its factorization.

121213211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350888 (or 350886 counting only the distinct ones).

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

Adding to 121213211212 its reverse (212112312121), we get a palindrome (333325523333).

The spelling of 121213211212 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred eleven thousand, two hundred twelve".