31323122101 has 4 divisors (see below), whose sum is σ = 31453093804. Its totient is φ = 31193150400.

The previous prime is 31323122099. The next prime is 31323122179. The reversal of 31323122101 is 10122132313.

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 28686196900 + 2636925201 = 169370^2 + 51351^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323122101 - 2¹ = 31323122099 is a prime.

It is a super-2 number, since 2×31323122101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323192101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64985490 + ... + 64985971.

It is an arithmetic number, because the mean of its divisors is an integer number (7863273451).

Almost surely, 2^31323122101 is an apocalyptic number.

It is an amenable number.

31323122101 is a deficient number, since it is larger than the sum of its proper divisors (129971703).

31323122101 is a wasteful number, since it uses less digits than its factorization.

31323122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129971702.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31323122101 its reverse (10122132313), we get a palindrome (41445254414).

The spelling of 31323122101 in words is "thirty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, one hundred one".