355212121 has 8 divisors (see below), whose sum is σ = 396516384. Its totient is φ = 315409920.

The previous prime is 355212103. The next prime is 355212139. The reversal of 355212121 is 121212553.

It is an interprime number because it is at equal distance from previous prime (355212103) and next prime (355212139).

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

It is a cyclic number.

It is not a de Polignac number, because 355212121 - 2⁷ = 355211993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 355212092 and 355212101.

It is not an unprimeable number, because it can be changed into a prime (355212101) 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, 375016 + ... + 375961.

It is an arithmetic number, because the mean of its divisors is an integer number (49564548).

Almost surely, 2^355212121 is an apocalyptic number.

It is an amenable number.

355212121 is a deficient number, since it is larger than the sum of its proper divisors (41304263).

355212121 is a wasteful number, since it uses less digits than its factorization.

355212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751031.

The product of its digits is 600, while the sum is 22.

The square root of 355212121 is about 18847.0719476528. The cubic root of 355212121 is about 708.2108765964.

Adding to 355212121 its reverse (121212553), we get a palindrome (476424674).

The spelling of 355212121 in words is "three hundred fifty-five million, two hundred twelve thousand, one hundred twenty-one".