355240124321 has 4 divisors (see below), whose sum is σ = 356087953200. Its totient is φ = 354392295444.

The previous prime is 355240124303. The next prime is 355240124339. The reversal of 355240124321 is 123421042553.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (355240124303) and next prime (355240124339).

It is a cyclic number.

It is not a de Polignac number, because 355240124321 - 2²² = 355235930017 is a prime.

It is a super-2 number, since 2×355240124321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355240174321) 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, 423913811 + ... + 423914648.

It is an arithmetic number, because the mean of its divisors is an integer number (89021988300).

Almost surely, 2^355240124321 is an apocalyptic number.

It is an amenable number.

355240124321 is a deficient number, since it is larger than the sum of its proper divisors (847828879).

355240124321 is an equidigital number, since it uses as much as digits as its factorization.

355240124321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847828878.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 355240124321 its reverse (123421042553), we get a palindrome (478661166874).

The spelling of 355240124321 in words is "three hundred fifty-five billion, two hundred forty million, one hundred twenty-four thousand, three hundred twenty-one".