121101111021011 has 4 divisors (see below), whose sum is σ = 132110302932024. Its totient is φ = 110091919110000.

The previous prime is 121101111021001. The next prime is 121101111021017. The reversal of 121101111021011 is 110120111101121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121101111021011 - 2³⁰ = 121100037279187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121101111021017) 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, 5504595955490 + ... + 5504595955511.

It is an arithmetic number, because the mean of its divisors is an integer number (33027575733006).

Almost surely, 2^{121101111021011} is an apocalyptic number.

121101111021011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121101111021011 is a deficient number, since it is larger than the sum of its proper divisors (11009191911013).

121101111021011 is a wasteful number, since it uses less digits than its factorization.

121101111021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11009191911012.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 121101111021011 its reverse (110120111101121), we get a palindrome (231221222122132).

The spelling of 121101111021011 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred eleven million, twenty-one thousand, eleven".