2155303353321 has 32 divisors (see below), whose sum is σ = 3197553840000. Its totient is φ = 1434839313600.

The previous prime is 2155303353293. The next prime is 2155303353337. The reversal of 2155303353321 is 1233533035512.

It is a happy number.

2155303353321 is a `hidden beast` number, since 2 + 1 + 553 + 0 + 33 + 53 + 3 + 21 = 666.

It is not a de Polignac number, because 2155303353321 - 2⁵ = 2155303353289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155303353221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217680471 + ... + 217690371.

It is an arithmetic number, because the mean of its divisors is an integer number (99923557500).

Almost surely, 2^{2155303353321} is an apocalyptic number.

It is an amenable number.

2155303353321 is a deficient number, since it is larger than the sum of its proper divisors (1042250486679).

2155303353321 is an equidigital number, since it uses as much as digits as its factorization.

2155303353321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20486 (or 20480 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 36.

Adding to 2155303353321 its reverse (1233533035512), we get a palindrome (3388836388833).

The spelling of 2155303353321 in words is "two trillion, one hundred fifty-five billion, three hundred three million, three hundred fifty-three thousand, three hundred twenty-one".