121200020102 has 24 divisors (see below), whose sum is σ = 218774144160. Its totient is φ = 50151731280.

The previous prime is 121200020069. The next prime is 121200020141. The reversal of 121200020102 is 201020002121.

It is a happy number.

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, 21320174 + ... + 21325857.

It is an arithmetic number, because the mean of its divisors is an integer number (9115589340).

Almost surely, 2^121200020102 is an apocalyptic number.

121200020102 is a deficient number, since it is larger than the sum of its proper divisors (97574124058).

121200020102 is a wasteful number, since it uses less digits than its factorization.

121200020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42646076 (or 42646069 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121200020102 its reverse (201020002121), we get a palindrome (322220022223).

The spelling of 121200020102 in words is "one hundred twenty-one billion, two hundred million, twenty thousand, one hundred two".