121241501 has 4 divisors (see below), whose sum is σ = 128373372. Its totient is φ = 114109632.

The previous prime is 121241473. The next prime is 121241507. The reversal of 121241501 is 105142121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105142121 = 7 ⋅15020303.

It can be written as a sum of positive squares in 2 ways, for example, as 102535876 + 18705625 = 10126^2 + 4325^2 .

It is a cyclic number.

It is not a de Polignac number, because 121241501 - 2⁶ = 121241437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7131853 = 121241501 / (1 + 2 + 1 + 2 + 4 + 1 + 5 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121241501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121241507) 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, 3565910 + ... + 3565943.

It is an arithmetic number, because the mean of its divisors is an integer number (32093343).

Almost surely, 2^121241501 is an apocalyptic number.

It is an amenable number.

121241501 is a deficient number, since it is larger than the sum of its proper divisors (7131871).

121241501 is an equidigital number, since it uses as much as digits as its factorization.

121241501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131870.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 121241501 is about 11010.9718462995. The cubic root of 121241501 is about 494.9375848930.

Adding to 121241501 its reverse (105142121), we get a palindrome (226383622).

The spelling of 121241501 in words is "one hundred twenty-one million, two hundred forty-one thousand, five hundred one".