1133121331321 has 6 divisors (see below), whose sum is σ = 1318120732410. Its totient is φ = 971246855376.

The previous prime is 1133121331319. The next prime is 1133121331361. The reversal of 1133121331321 is 1231331213311.

It can be written as a sum of positive squares in only one way, i.e., 867112953721 + 266008377600 = 931189^2 + 515760^2 .

It is not a de Polignac number, because 1133121331321 - 2¹ = 1133121331319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1133121331301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11562462516 + ... + 11562462613.

It is an arithmetic number, because the mean of its divisors is an integer number (219686788735).

Almost surely, 2^{1133121331321} is an apocalyptic number.

It is an amenable number.

1133121331321 is a deficient number, since it is larger than the sum of its proper divisors (184999401089).

1133121331321 is an equidigital number, since it uses as much as digits as its factorization.

1133121331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23124925143 (or 23124925136 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

Adding to 1133121331321 its reverse (1231331213311), we get a palindrome (2364452544632).

The spelling of 1133121331321 in words is "one trillion, one hundred thirty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-one".