342121440321 has 12 divisors (see below), whose sum is σ = 494671089172. Its totient is φ = 227852186976.

The previous prime is 342121440277. The next prime is 342121440337. The reversal of 342121440321 is 123044121243.

342121440321 is a `hidden beast` number, since 3 + 4 + 21 + 214 + 403 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 288975054096 + 53146386225 = 537564^2 + 230535^2 .

It is not a de Polignac number, because 342121440321 - 2²¹ = 342119343169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342121440361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19054966 + ... + 19072911.

Almost surely, 2^342121440321 is an apocalyptic number.

It is an amenable number.

342121440321 is a deficient number, since it is larger than the sum of its proper divisors (152549648851).

342121440321 is a wasteful number, since it uses less digits than its factorization.

342121440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38128880 (or 38128877 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 342121440321 its reverse (123044121243), we get a palindrome (465165561564).

The spelling of 342121440321 in words is "three hundred forty-two billion, one hundred twenty-one million, four hundred forty thousand, three hundred twenty-one".