120103243553 has 4 divisors (see below), whose sum is σ = 124244734740. Its totient is φ = 115961752368.

The previous prime is 120103243511. The next prime is 120103243691. The reversal of 120103243553 is 355342301021.

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 29061043729 + 91042199824 = 170473^2 + 301732^2 .

It is a cyclic number.

It is not a de Polignac number, because 120103243553 - 2²⁴ = 120086466337 is a prime.

It is a super-2 number, since 2×120103243553² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4141491157 = 120103243553 / (1 + 2 + 0 + 1 + 0 + 3 + 2 + 4 + 3 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120103243153) 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, 2070745550 + ... + 2070745607.

It is an arithmetic number, because the mean of its divisors is an integer number (31061183685).

Almost surely, 2^120103243553 is an apocalyptic number.

It is an amenable number.

120103243553 is a deficient number, since it is larger than the sum of its proper divisors (4141491187).

120103243553 is an equidigital number, since it uses as much as digits as its factorization.

120103243553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141491186.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 120103243553 its reverse (355342301021), we get a palindrome (475445544574).

The spelling of 120103243553 in words is "one hundred twenty billion, one hundred three million, two hundred forty-three thousand, five hundred fifty-three".