121000020102 has 32 divisors (see below), whose sum is σ = 289572699360. Its totient is φ = 37230775200.

The previous prime is 121000020079. The next prime is 121000020139. The reversal of 121000020102 is 201020000121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86181649 + ... + 86183052.

It is an arithmetic number, because the mean of its divisors is an integer number (9049146855).

Almost surely, 2^121000020102 is an apocalyptic number.

121000020102 is an abundant number, since it is smaller than the sum of its proper divisors (168572679258).

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

121000020102 is a wasteful number, since it uses less digits than its factorization.

121000020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172364725 (or 172364719 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121000020102 its reverse (201020000121), we get a palindrome (322020020223).

The spelling of 121000020102 in words is "one hundred twenty-one billion, twenty thousand, one hundred two".