1355334522121 has 4 divisors (see below), whose sum is σ = 1355339521044. Its totient is φ = 1355329523200.

The previous prime is 1355334522049. The next prime is 1355334522149. The reversal of 1355334522121 is 1212254335531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81190233721 + 1274144288400 = 284939^2 + 1128780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355334522121 - 2⁷ = 1355334521993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355334522161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067940 + ... + 2643301.

It is an arithmetic number, because the mean of its divisors is an integer number (338834880261).

Almost surely, 2^{1355334522121} is an apocalyptic number.

It is an amenable number.

1355334522121 is a deficient number, since it is larger than the sum of its proper divisors (4998923).

1355334522121 is an equidigital number, since it uses as much as digits as its factorization.

1355334522121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998922.

The product of its digits is 108000, while the sum is 37.

Adding to 1355334522121 its reverse (1212254335531), we get a palindrome (2567588857652).

The spelling of 1355334522121 in words is "one trillion, three hundred fifty-five billion, three hundred thirty-four million, five hundred twenty-two thousand, one hundred twenty-one".