31123320333001 has 4 divisors (see below), whose sum is σ = 33517421897092. Its totient is φ = 28729218768912.

The previous prime is 31123320332999. The next prime is 31123320333031. The reversal of 31123320333001 is 10033302332113.

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 18349880072976 + 12773440260025 = 4283676^2 + 3573995^2 .

It is a cyclic number.

It is not a de Polignac number, because 31123320333001 - 2¹ = 31123320332999 is a prime.

It is a super-2 number, since 2×31123320333001² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123320333031) 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, 1197050782026 + ... + 1197050782051.

It is an arithmetic number, because the mean of its divisors is an integer number (8379355474273).

Almost surely, 2^{31123320333001} is an apocalyptic number.

It is an amenable number.

31123320333001 is a deficient number, since it is larger than the sum of its proper divisors (2394101564091).

31123320333001 is a wasteful number, since it uses less digits than its factorization.

31123320333001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394101564090.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 31123320333001 its reverse (10033302332113), we get a palindrome (41156622665114).

The spelling of 31123320333001 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred twenty million, three hundred thirty-three thousand, one".