121102112121 has 16 divisors (see below), whose sum is σ = 165583543680. Its totient is φ = 78703264640.

The previous prime is 121102112107. The next prime is 121102112123. The reversal of 121102112121 is 121211201121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121102112121 - 2⁶ = 121102112057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121102112121.

It is not an unprimeable number, because it can be changed into a prime (121102112123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3175170 + ... + 3213083.

It is an arithmetic number, because the mean of its divisors is an integer number (10348971480).

Almost surely, 2^121102112121 is an apocalyptic number.

It is an amenable number.

121102112121 is a deficient number, since it is larger than the sum of its proper divisors (44481431559).

121102112121 is an equidigital number, since it uses as much as digits as its factorization.

121102112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388416.

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

Adding to 121102112121 its reverse (121211201121), we get a palindrome (242313313242).

The spelling of 121102112121 in words is "one hundred twenty-one billion, one hundred two million, one hundred twelve thousand, one hundred twenty-one".