31123022210113 has 4 divisors (see below), whose sum is σ = 31221202091220. Its totient is φ = 31024842329008.

The previous prime is 31123022210107. The next prime is 31123022210129. The reversal of 31123022210113 is 31101222032113.

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 613671690384 + 30509350519729 = 783372^2 + 5523527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123022210113 is a prime.

It is a super-2 number, since 2×31123022210113² (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 (31123022217113) 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, 49089940078 + ... + 49089940711.

It is an arithmetic number, because the mean of its divisors is an integer number (7805300522805).

Almost surely, 2^{31123022210113} is an apocalyptic number.

It is an amenable number.

31123022210113 is a deficient number, since it is larger than the sum of its proper divisors (98179881107).

31123022210113 is an equidigital number, since it uses as much as digits as its factorization.

31123022210113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98179881106.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31123022210113 its reverse (31101222032113), we get a palindrome (62224244242226).

The spelling of 31123022210113 in words is "thirty-one trillion, one hundred twenty-three billion, twenty-two million, two hundred ten thousand, one hundred thirteen".