123503153221 has 8 divisors (see below), whose sum is σ = 148575222080. Its totient is φ = 100288274688.

The previous prime is 123503153167. The next prime is 123503153233. The reversal of 123503153221 is 122351305321.

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

It is not a de Polignac number, because 123503153221 - 2³¹ = 121355669573 is a prime.

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 123503153221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123503153021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464297436 + ... + 464297701.

It is an arithmetic number, because the mean of its divisors is an integer number (18571902760).

Almost surely, 2^123503153221 is an apocalyptic number.

It is an amenable number.

123503153221 is a deficient number, since it is larger than the sum of its proper divisors (25072068859).

123503153221 is an equidigital number, since it uses as much as digits as its factorization.

123503153221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928595163.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 123503153221 its reverse (122351305321), we get a palindrome (245854458542).

The spelling of 123503153221 in words is "one hundred twenty-three billion, five hundred three million, one hundred fifty-three thousand, two hundred twenty-one".