121221120102 has 16 divisors (see below), whose sum is σ = 242481973680. Its totient is φ = 40400417792.

The previous prime is 121221120101. The next prime is 121221120121. The reversal of 121221120102 is 201021122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221120101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1615827 + ... + 1689182.

It is an arithmetic number, because the mean of its divisors is an integer number (15155123355).

Almost surely, 2^121221120102 is an apocalyptic number.

121221120102 is an abundant number, since it is smaller than the sum of its proper divisors (121260853578).

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

121221120102 is a wasteful number, since it uses less digits than its factorization.

121221120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311127.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221120102 its reverse (201021122121), we get a palindrome (322242242223).

The spelling of 121221120102 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred two".