121100212121212 has 12 divisors (see below), whose sum is σ = 211925456786736. Its totient is φ = 60550081610720.

The previous prime is 121100212121209. The next prime is 121100212121281. The reversal of 121100212121212 is 212121212001121.

It is a happy number.

It is a super-2 number, since 2×121100212121212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121100212121212.

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, 9413793 + ... + 18188455.

It is an arithmetic number, because the mean of its divisors is an integer number (17660454732228).

Almost surely, 2^{121100212121212} is an apocalyptic number.

It is an amenable number.

121100212121212 is a deficient number, since it is larger than the sum of its proper divisors (90825244665524).

121100212121212 is a wasteful number, since it uses less digits than its factorization.

121100212121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224948 (or 12224946 counting only the distinct ones).

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

Adding to 121100212121212 its reverse (212121212001121), we get a palindrome (333221424122333).

The spelling of 121100212121212 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twelve".