121200102 has 24 divisors (see below), whose sum is σ = 263586960. Its totient is φ = 40248240.

The previous prime is 121200097. The next prime is 121200109. The reversal of 121200102 is 201002121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200109) 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 11 ways as a sum of consecutive naturals, for example, 7674 + ... + 17357.

It is an arithmetic number, because the mean of its divisors is an integer number (10982790).

Almost surely, 2^121200102 is an apocalyptic number.

121200102 is an abundant number, since it is smaller than the sum of its proper divisors (142386858).

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

121200102 is a wasteful number, since it uses less digits than its factorization.

121200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25308 (or 25305 counting only the distinct ones).

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

The square root of 121200102 is about 11009.0917881540. The cubic root of 121200102 is about 494.8812448513.

Adding to 121200102 its reverse (201002121), we get a palindrome (322202223).

The spelling of 121200102 in words is "one hundred twenty-one million, two hundred thousand, one hundred two".