355312420321 has 4 divisors (see below), whose sum is σ = 355317530644. Its totient is φ = 355307310000.

The previous prime is 355312420301. The next prime is 355312420399. The reversal of 355312420321 is 123024213553.

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 211319493025 + 143992927296 = 459695^2 + 379464^2 .

It is a cyclic number.

It is not a de Polignac number, because 355312420321 - 2⁵ = 355312420289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355312420301) 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, 2449410 + ... + 2590411.

It is an arithmetic number, because the mean of its divisors is an integer number (88829382661).

Almost surely, 2^355312420321 is an apocalyptic number.

It is an amenable number.

355312420321 is a deficient number, since it is larger than the sum of its proper divisors (5110323).

355312420321 is an equidigital number, since it uses as much as digits as its factorization.

355312420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110322.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 355312420321 its reverse (123024213553), we get a palindrome (478336633874).

The spelling of 355312420321 in words is "three hundred fifty-five billion, three hundred twelve million, four hundred twenty thousand, three hundred twenty-one".