121300253 has 4 divisors (see below), whose sum is σ = 128435580. Its totient is φ = 114164928.

The previous prime is 121300159. The next prime is 121300261. The reversal of 121300253 is 352003121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352003121 = 2393 ⋅147097.

It can be written as a sum of positive squares in 2 ways, for example, as 59552089 + 61748164 = 7717^2 + 7858^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121300253 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: 7135309 = 121300253 / (1 + 2 + 1 + 3 + 0 + 0 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121300273) 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, 3567638 + ... + 3567671.

It is an arithmetic number, because the mean of its divisors is an integer number (32108895).

Almost surely, 2^121300253 is an apocalyptic number.

It is an amenable number.

121300253 is a deficient number, since it is larger than the sum of its proper divisors (7135327).

121300253 is an equidigital number, since it uses as much as digits as its factorization.

121300253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7135326.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 121300253 is about 11013.6394075710. The cubic root of 121300253 is about 495.0175186807.

Adding to 121300253 its reverse (352003121), we get a palindrome (473303374).

The spelling of 121300253 in words is "one hundred twenty-one million, three hundred thousand, two hundred fifty-three".