111101000000121 has 48 divisors (see below), whose sum is σ = 166129789722624. Its totient is φ = 71491387024512.

The previous prime is 111101000000117. The next prime is 111101000000161. The reversal of 111101000000121 is 121000000101111.

It is not a de Polignac number, because 111101000000121 - 2² = 111101000000117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111101000000101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 474091840 + ... + 474326126.

It is an arithmetic number, because the mean of its divisors is an integer number (3461037285888).

Almost surely, 2^{111101000000121} is an apocalyptic number.

It is an amenable number.

111101000000121 is a deficient number, since it is larger than the sum of its proper divisors (55028789722503).

111101000000121 is a wasteful number, since it uses less digits than its factorization.

111101000000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245670 (or 245667 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111101000000121 its reverse (121000000101111), we get a palindrome (232101000101232).

The spelling of 111101000000121 in words is "one hundred eleven trillion, one hundred one billion, one hundred twenty-one", and thus it is an aban number.