121200111122101 has 16 divisors (see below), whose sum is σ = 137979006197760. Its totient is φ = 105382172217520.

The previous prime is 121200111122063. The next prime is 121200111122161. The reversal of 121200111122101 is 101221111002121.

It is not a de Polignac number, because 121200111122101 - 2⁹ = 121200111121589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200111122161) 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, 18078721 + ... + 23858758.

It is an arithmetic number, because the mean of its divisors is an integer number (8623687887360).

Almost surely, 2^{121200111122101} is an apocalyptic number.

121200111122101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121200111122101 is a deficient number, since it is larger than the sum of its proper divisors (16778895075659).

121200111122101 is a wasteful number, since it uses less digits than its factorization.

121200111122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41948936.

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

Adding to 121200111122101 its reverse (101221111002121), we get a palindrome (222421222124222).

The spelling of 121200111122101 in words is "one hundred twenty-one trillion, two hundred billion, one hundred eleven million, one hundred twenty-two thousand, one hundred one".