1331021333101 has 4 divisors (see below), whose sum is σ = 1332999077212. Its totient is φ = 1329043588992.

The previous prime is 1331021332969. The next prime is 1331021333137. The reversal of 1331021333101 is 1013331201331.

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 537657029001 + 793364304100 = 733251^2 + 890710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331021333101 - 2¹³ = 1331021324909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331021337101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988871046 + ... + 988872391.

It is an arithmetic number, because the mean of its divisors is an integer number (333249769303).

Almost surely, 2^{1331021333101} is an apocalyptic number.

It is an amenable number.

1331021333101 is a deficient number, since it is larger than the sum of its proper divisors (1977744111).

1331021333101 is an equidigital number, since it uses as much as digits as its factorization.

1331021333101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977744110.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 1331021333101 its reverse (1013331201331), we get a palindrome (2344352534432).

The spelling of 1331021333101 in words is "one trillion, three hundred thirty-one billion, twenty-one million, three hundred thirty-three thousand, one hundred one".