121220211212 has 12 divisors (see below), whose sum is σ = 212890301736. Its totient is φ = 60394410720.

The previous prime is 121220211199. The next prime is 121220211239. The reversal of 121220211212 is 212112022121.

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, 53922458 + ... + 53924705.

It is an arithmetic number, because the mean of its divisors is an integer number (17740858478).

Almost surely, 2^121220211212 is an apocalyptic number.

It is an amenable number.

121220211212 is a deficient number, since it is larger than the sum of its proper divisors (91670090524).

121220211212 is a wasteful number, since it uses less digits than its factorization.

121220211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107847448 (or 107847446 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121220211212 its reverse (212112022121), we get a palindrome (333332233333).

The spelling of 121220211212 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, two hundred twelve".