1331122121 has 8 divisors (see below), whose sum is σ = 1601350080. Its totient is φ = 1080911088.

The previous prime is 1331122103. The next prime is 1331122153. The reversal of 1331122121 is 1212211331.

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 1331122121 - 2⁶ = 1331122057 is a prime.

It is a super-2 number, since 2×1331122121² = 3543772202031077282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331122121.

It is not an unprimeable number, because it can be changed into a prime (1331122421) 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 7 ways as a sum of consecutive naturals, for example, 5004086 + ... + 5004351.

It is an arithmetic number, because the mean of its divisors is an integer number (200168760).

Almost surely, 2^1331122121 is an apocalyptic number.

It is an amenable number.

1331122121 is a deficient number, since it is larger than the sum of its proper divisors (270227959).

1331122121 is a wasteful number, since it uses less digits than its factorization.

1331122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008463.

The product of its digits is 72, while the sum is 17.

The square root of 1331122121 is about 36484.5463312894. The cubic root of 1331122121 is about 1100.0336411199.

Adding to 1331122121 its reverse (1212211331), we get a palindrome (2543333452).

The spelling of 1331122121 in words is "one billion, three hundred thirty-one million, one hundred twenty-two thousand, one hundred twenty-one".