121440141 has 20 divisors (see below), whose sum is σ = 182192604. Its totient is φ = 80611200.

The previous prime is 121440103. The next prime is 121440167. The reversal of 121440141 is 141044121.

It can be written as a sum of positive squares in 2 ways, for example, as 41409225 + 80030916 = 6435^2 + 8946^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121440141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121440101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16411 + ... + 22631.

Almost surely, 2^121440141 is an apocalyptic number.

It is an amenable number.

121440141 is a deficient number, since it is larger than the sum of its proper divisors (60752463).

121440141 is an equidigital number, since it uses as much as digits as its factorization.

121440141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474 (or 6465 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 121440141 is about 11019.9882486326. The cubic root of 121440141 is about 495.2077364986.

Adding to 121440141 its reverse (141044121), we get a palindrome (262484262).

The spelling of 121440141 in words is "one hundred twenty-one million, four hundred forty thousand, one hundred forty-one".