121011111111121 has 64 divisors (see below), whose sum is σ = 159023572402176. Its totient is φ = 89345611699200.

The previous prime is 121011111111091. The next prime is 121011111111223. The reversal of 121011111111121 is 121111111110121.

It is a cyclic number.

It is not a de Polignac number, because 121011111111121 - 2⁵ = 121011111111089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011111111095 and 121011111111104.

It is not an unprimeable number, because it can be changed into a prime (121011111111721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21337846 + ... + 26406928.

It is an arithmetic number, because the mean of its divisors is an integer number (2484743318784).

Almost surely, 2^{121011111111121} is an apocalyptic number.

121011111111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121011111111121 is a deficient number, since it is larger than the sum of its proper divisors (38012461291055).

121011111111121 is a wasteful number, since it uses less digits than its factorization.

121011111111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069342.

The product of its (nonzero) digits is 4, while the sum is 16.

Adding to 121011111111121 its reverse (121111111110121), we get a palindrome (242122222221242).

The spelling of 121011111111121 in words is "one hundred twenty-one trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-one".