121112121011 has 24 divisors (see below), whose sum is σ = 145750933440. Its totient is φ = 100275504000.

The previous prime is 121112121001. The next prime is 121112121029. The reversal of 121112121011 is 110121211121.

It is a de Polignac number, because none of the positive numbers 2^k-121112121011 is a prime.

It is a super-3 number, since 3×121112121011³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121112121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95531 + ... + 501348.

It is an arithmetic number, because the mean of its divisors is an integer number (6072955560).

Almost surely, 2^121112121011 is an apocalyptic number.

121112121011 is a deficient number, since it is larger than the sum of its proper divisors (24638812429).

121112121011 is a wasteful number, since it uses less digits than its factorization.

121112121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597035 (or 597028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121112121011 its reverse (110121211121), we get a palindrome (231233332132).

The spelling of 121112121011 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, eleven".