354042011213221 has 6 divisors (see below), whose sum is σ = 366671333849522. Its totient is φ = 341833665998160.

The previous prime is 354042011213203. The next prime is 354042011213249. The reversal of 354042011213221 is 122312110240453.

It can be written as a sum of positive squares in 3 ways, for example, as 43314312612321 + 310727698600900 = 6581361^2 + 17627470^2 .

It is not a de Polignac number, because 354042011213221 - 2³⁵ = 354007651474853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354042011217221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210488709750 + ... + 210488711431.

Almost surely, 2^{354042011213221} is an apocalyptic number.

It is an amenable number.

354042011213221 is a deficient number, since it is larger than the sum of its proper divisors (12629322636301).

354042011213221 is an equidigital number, since it uses as much as digits as its factorization.

354042011213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420977421239 (or 420977421210 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 354042011213221 its reverse (122312110240453), we get a palindrome (476354121453674).

The spelling of 354042011213221 in words is "three hundred fifty-four trillion, forty-two billion, eleven million, two hundred thirteen thousand, two hundred twenty-one".