1331123001 has 32 divisors (see below), whose sum is σ = 2027047680. Its totient is φ = 769726464.

The previous prime is 1331122993. The next prime is 1331123009. The reversal of 1331123001 is 1003211331.

It is an interprime number because it is at equal distance from previous prime (1331122993) and next prime (1331123009).

It is not a de Polignac number, because 1331123001 - 2³ = 1331122993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1331123009) 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, 555061 + ... + 557453.

It is an arithmetic number, because the mean of its divisors is an integer number (63345240).

Almost surely, 2^1331123001 is an apocalyptic number.

It is an amenable number.

1331123001 is a deficient number, since it is larger than the sum of its proper divisors (695924679).

1331123001 is a wasteful number, since it uses less digits than its factorization.

1331123001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1331123001 is about 36484.5583911879. The cubic root of 1331123001 is about 1100.0338835293.

Adding to 1331123001 its reverse (1003211331), we get a palindrome (2334334332).

The spelling of 1331123001 in words is "one billion, three hundred thirty-one million, one hundred twenty-three thousand, one".