121001112111 has 24 divisors (see below), whose sum is σ = 183055462912. Its totient is φ = 70968387600.

The previous prime is 121001112101. The next prime is 121001112139. The reversal of 121001112111 is 111211100121.

It is not a de Polignac number, because 121001112111 - 2⁵ = 121001112079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001112101) 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, 5365141 + ... + 5387646.

Almost surely, 2^121001112111 is an apocalyptic number.

121001112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121001112111 is a deficient number, since it is larger than the sum of its proper divisors (62054350801).

121001112111 is a wasteful number, since it uses less digits than its factorization.

121001112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752843 (or 10752832 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121001112111 its reverse (111211100121), we get a palindrome (232212212232).

It can be divided in two parts, 12100 and 1112111, that added together give a palindrome (1124211).

The spelling of 121001112111 in words is "one hundred twenty-one billion, one million, one hundred twelve thousand, one hundred eleven".