121441013 has 4 divisors (see below), whose sum is σ = 128584620. Its totient is φ = 114297408.

The previous prime is 121441003. The next prime is 121441069. The reversal of 121441013 is 310144121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56445169 + 64995844 = 7513^2 + 8062^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121441013 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: 7143589 = 121441013 / (1 + 2 + 1 + 4 + 4 + 1 + 0 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121440982 and 121441000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121441003) 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, 3571778 + ... + 3571811.

It is an arithmetic number, because the mean of its divisors is an integer number (32146155).

Almost surely, 2^121441013 is an apocalyptic number.

It is an amenable number.

121441013 is a deficient number, since it is larger than the sum of its proper divisors (7143607).

121441013 is an equidigital number, since it uses as much as digits as its factorization.

121441013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7143606.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 121441013 is about 11020.0278130321. The cubic root of 121441013 is about 495.2089217742.

Adding to 121441013 its reverse (310144121), we get a palindrome (431585134).

The spelling of 121441013 in words is "one hundred twenty-one million, four hundred forty-one thousand, thirteen".