121111020111121 has 4 divisors (see below), whose sum is σ = 121111042121712. Its totient is φ = 121110998100532.

The previous prime is 121111020110989. The next prime is 121111020111127.

121111020111121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121111020111121 - 2¹⁵ = 121111020078353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111020111095 and 121111020111104.

It is not an unprimeable number, because it can be changed into a prime (121111020111127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5391426 + ... + 16470868.

It is an arithmetic number, because the mean of its divisors is an integer number (30277760530428).

Almost surely, 2^{121111020111121} is an apocalyptic number.

It is an amenable number.

121111020111121 is a deficient number, since it is larger than the sum of its proper divisors (22010591).

121111020111121 is a wasteful number, since it uses less digits than its factorization.

121111020111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22010590.

The product of its (nonzero) digits is 8, while the sum is 16.

The spelling of 121111020111121 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty million, one hundred eleven thousand, one hundred twenty-one".