122003553 has 8 divisors (see below), whose sum is σ = 185910208. Its totient is φ = 69716304.

The previous prime is 122003549. The next prime is 122003561. The reversal of 122003553 is 355300221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122003553 - 2² = 122003549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5809693 = 122003553 / (1 + 2 + 2 + 0 + 0 + 3 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122003533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2904826 + ... + 2904867.

It is an arithmetic number, because the mean of its divisors is an integer number (23238776).

Almost surely, 2^122003553 is an apocalyptic number.

It is an amenable number.

122003553 is a deficient number, since it is larger than the sum of its proper divisors (63906655).

122003553 is an equidigital number, since it uses as much as digits as its factorization.

122003553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5809703.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 122003553 is about 11045.5218527691. The cubic root of 122003553 is about 495.9723810172.

Adding to 122003553 its reverse (355300221), we get a palindrome (477303774).

It can be divided in two parts, 12200 and 3553, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 122003553 in words is "one hundred twenty-two million, three thousand, five hundred fifty-three".