121112112102 has 16 divisors (see below), whose sum is σ = 242557416192. Its totient is φ = 40315172040.

The previous prime is 121112112067. The next prime is 121112112109. The reversal of 121112112102 is 201211211121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112112109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13878274 + ... + 13886997.

It is an arithmetic number, because the mean of its divisors is an integer number (15159838512).

Almost surely, 2^121112112102 is an apocalyptic number.

121112112102 is an abundant number, since it is smaller than the sum of its proper divisors (121445304090).

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

121112112102 is a wasteful number, since it uses less digits than its factorization.

121112112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27766003.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121112112102 its reverse (201211211121), we get a palindrome (322323323223).

The spelling of 121112112102 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, one hundred two".