31023222101 has 4 divisors (see below), whose sum is σ = 31026520332. Its totient is φ = 31019923872.

The previous prime is 31023222079. The next prime is 31023222121. The reversal of 31023222101 is 10122232013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10122232013 = 653 ⋅15501121.

It can be written as a sum of positive squares in 2 ways, for example, as 15204123025 + 15819099076 = 123305^2 + 125774^2 .

It is a cyclic number.

It is not a de Polignac number, because 31023222101 - 2³⁴ = 13843352917 is a prime.

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 31023222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023222121) 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, 1634966 + ... + 1653831.

It is an arithmetic number, because the mean of its divisors is an integer number (7756630083).

Almost surely, 2^31023222101 is an apocalyptic number.

It is an amenable number.

31023222101 is a deficient number, since it is larger than the sum of its proper divisors (3298231).

31023222101 is an equidigital number, since it uses as much as digits as its factorization.

31023222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298230.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31023222101 its reverse (10122232013), we get a palindrome (41145454114).

The spelling of 31023222101 in words is "thirty-one billion, twenty-three million, two hundred twenty-two thousand, one hundred one".