354212121 has 8 divisors (see below), whose sum is σ = 492816960. Its totient is φ = 225874352.

The previous prime is 354212099. The next prime is 354212123. The reversal of 354212121 is 121212453.

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

It is not a de Polignac number, because 354212121 - 2¹⁰ = 354211097 is a prime.

It is a super-3 number, since 3×354212121³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (354212123) 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, 2566686 + ... + 2566823.

It is an arithmetic number, because the mean of its divisors is an integer number (61602120).

Almost surely, 2^354212121 is an apocalyptic number.

It is an amenable number.

354212121 is a deficient number, since it is larger than the sum of its proper divisors (138604839).

354212121 is a wasteful number, since it uses less digits than its factorization.

354212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133535.

The product of its digits is 480, while the sum is 21.

The square root of 354212121 is about 18820.5239300079. The cubic root of 354212121 is about 707.5456623336.

Adding to 354212121 its reverse (121212453), we get a palindrome (475424574).

The spelling of 354212121 in words is "three hundred fifty-four million, two hundred twelve thousand, one hundred twenty-one".