121200012102 has 64 divisors (see below), whose sum is σ = 262233167616. Its totient is φ = 37123021440.

The previous prime is 121200012053. The next prime is 121200012149. The reversal of 121200012102 is 201210002121.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 28495408 + ... + 28499660.

It is an arithmetic number, because the mean of its divisors is an integer number (4097393244).

Almost surely, 2^121200012102 is an apocalyptic number.

121200012102 is an abundant number, since it is smaller than the sum of its proper divisors (141033155514).

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

121200012102 is a wasteful number, since it uses less digits than its factorization.

121200012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121200012102 its reverse (201210002121), we get a palindrome (322410014223).

The spelling of 121200012102 in words is "one hundred twenty-one billion, two hundred million, twelve thousand, one hundred two".