121144111 has 6 divisors (see below), whose sum is σ = 133158536. Its totient is φ = 110130900.

The previous prime is 121144103. The next prime is 121144139. The reversal of 121144111 is 111441121.

It is not a de Polignac number, because 121144111 - 2³ = 121144103 is a prime.

It is a super-3 number, since 3×121144111³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121144211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500475 + ... + 500716.

Almost surely, 2^121144111 is an apocalyptic number.

121144111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121144111 is a deficient number, since it is larger than the sum of its proper divisors (12014425).

121144111 is a wasteful number, since it uses less digits than its factorization.

121144111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001213 (or 1001202 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

The square root of 121144111 is about 11006.5485507492. The cubic root of 121144111 is about 494.8050260931.

Adding to 121144111 its reverse (111441121), we get a palindrome (232585232).

It can be divided in two parts, 1 and 21144111, that added together give a palindrome (21144112).

The spelling of 121144111 in words is "one hundred twenty-one million, one hundred forty-four thousand, one hundred eleven".