121221021012102 has 24 divisors (see below), whose sum is σ = 286522413301800. Its totient is φ = 36733642730880.

The previous prime is 121221021012079. The next prime is 121221021012121. The reversal of 121221021012102 is 201210120122121.

121221021012102 is a `hidden beast` number, since 1 + 21 + 221 + 0 + 210 + 1 + 210 + 2 = 666.

121221021012102 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 11 ways as a sum of consecutive naturals, for example, 306113689227 + ... + 306113689622.

It is an arithmetic number, because the mean of its divisors is an integer number (11938433887575).

Almost surely, 2^{121221021012102} is an apocalyptic number.

121221021012102 is an abundant number, since it is smaller than the sum of its proper divisors (165301392289698).

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

121221021012102 is a wasteful number, since it uses less digits than its factorization.

121221021012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612227378868 (or 612227378865 counting only the distinct ones).

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

Adding to 121221021012102 its reverse (201210120122121), we get a palindrome (322431141134223).

The spelling of 121221021012102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, twelve thousand, one hundred two".