355222121215 has 64 divisors (see below), whose sum is σ = 495216288000. Its totient is φ = 242270797824.

The previous prime is 355222121203. The next prime is 355222121269. The reversal of 355222121215 is 512121222553.

It is a cyclic number.

It is not a de Polignac number, because 355222121215 - 2⁵ = 355222121183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16041271 + ... + 16063399.

It is an arithmetic number, because the mean of its divisors is an integer number (7737754500).

Almost surely, 2^355222121215 is an apocalyptic number.

355222121215 is a deficient number, since it is larger than the sum of its proper divisors (139994166785).

355222121215 is a wasteful number, since it uses less digits than its factorization.

355222121215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22436.

The product of its digits is 12000, while the sum is 31.

Adding to 355222121215 its reverse (512121222553), we get a palindrome (867343343768).

The spelling of 355222121215 in words is "three hundred fifty-five billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred fifteen".