121221201101212 has 12 divisors (see below), whose sum is σ = 212196341578536. Its totient is φ = 60593674935920.

The previous prime is 121221201101159. The next prime is 121221201101233. The reversal of 121221201101212 is 212101102122121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221201101212.

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, 4231387558 + ... + 4231416205.

It is an arithmetic number, because the mean of its divisors is an integer number (17683028464878).

Almost surely, 2^{121221201101212} is an apocalyptic number.

It is an amenable number.

121221201101212 is a deficient number, since it is larger than the sum of its proper divisors (90975140477324).

121221201101212 is a wasteful number, since it uses less digits than its factorization.

121221201101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8462807348 (or 8462807346 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121221201101212 its reverse (212101102122121), we get a palindrome (333322303223333).

The spelling of 121221201101212 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, one hundred one thousand, two hundred twelve".