121221210200102 has 16 divisors (see below), whose sum is σ = 188105793598800. Its totient is φ = 58519366016160.

The previous prime is 121221210200093. The next prime is 121221210200107. The reversal of 121221210200102 is 201002012122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221210200107) 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, 18940577 + ... + 24519132.

It is an arithmetic number, because the mean of its divisors is an integer number (11756612099925).

Almost surely, 2^{121221210200102} is an apocalyptic number.

121221210200102 is a deficient number, since it is larger than the sum of its proper divisors (66884583398698).

121221210200102 is a wasteful number, since it uses less digits than its factorization.

121221210200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43507831.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221210200102 its reverse (201002012122121), we get a palindrome (322223222322223).

The spelling of 121221210200102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred ten million, two hundred thousand, one hundred two".