121201100221212 has 36 divisors (see below), whose sum is σ = 334221215762616. Its totient is φ = 36727606127520.

The previous prime is 121201100221037. The next prime is 121201100221237. The reversal of 121201100221212 is 212122001102121.

121201100221212 is a `hidden beast` number, since 1 + 2 + 120 + 110 + 0 + 221 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153031691803 + ... + 153031692594.

Almost surely, 2^{121201100221212} is an apocalyptic number.

121201100221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121201100221212 is an abundant number, since it is smaller than the sum of its proper divisors (213020115541404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121201100221212 is a wasteful number, since it uses less digits than its factorization.

121201100221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306063384418 (or 306063384413 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121201100221212 its reverse (212122001102121), we get a palindrome (333323101323333).

The spelling of 121201100221212 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred million, two hundred twenty-one thousand, two hundred twelve".