121100221221212 has 48 divisors (see below), whose sum is σ = 224002171290240. Its totient is φ = 57126184379712.

The previous prime is 121100221221211. The next prime is 121100221221233. The reversal of 121100221221212 is 212122122001121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100221221211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38637923 + ... + 41654405.

It is an arithmetic number, because the mean of its divisors is an integer number (4666711901880).

Almost surely, 2^{121100221221212} is an apocalyptic number.

It is an amenable number.

121100221221212 is a deficient number, since it is larger than the sum of its proper divisors (102901950069028).

121100221221212 is a wasteful number, since it uses less digits than its factorization.

121100221221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018690 (or 3018688 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121100221221212 its reverse (212122122001121), we get a palindrome (333222343222333).

The spelling of 121100221221212 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".