121221021111102 has 48 divisors (see below), whose sum is σ = 286539489505152. Its totient is φ = 36731453534160.

The previous prime is 121221021111031. The next prime is 121221021111149. The reversal of 121221021111102 is 201111120122121.

It is a happy number.

121221021111102 is a `hidden beast` number, since 121 + 221 + 0 + 211 + 1 + 110 + 2 = 666.

121221021111102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 14911338 + ... + 21558989.

It is an arithmetic number, because the mean of its divisors is an integer number (5969572698024).

Almost surely, 2^{121221021111102} is an apocalyptic number.

121221021111102 is an abundant number, since it is smaller than the sum of its proper divisors (165318468394050).

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

121221021111102 is a wasteful number, since it uses less digits than its factorization.

121221021111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36487133 (or 36487130 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121221021111102 its reverse (201111120122121), we get a palindrome (322332141233223).

The spelling of 121221021111102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred eleven thousand, one hundred two".