31021100041 has 4 divisors (see below), whose sum is σ = 31200412932. Its totient is φ = 30841787152.

The previous prime is 31021100029. The next prime is 31021100059. The reversal of 31021100041 is 14000112013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14000112013 = 61 ⋅229510033.

It can be written as a sum of positive squares in 2 ways, for example, as 22368193600 + 8652906441 = 149560^2 + 93021^2 .

It is a cyclic number.

It is not a de Polignac number, because 31021100041 - 2⁵ = 31021100009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31021099994 and 31021100030.

It is not an unprimeable number, because it can be changed into a prime (31021100021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89656186 + ... + 89656531.

It is an arithmetic number, because the mean of its divisors is an integer number (7800103233).

Almost surely, 2^31021100041 is an apocalyptic number.

It is an amenable number.

31021100041 is a deficient number, since it is larger than the sum of its proper divisors (179312891).

31021100041 is a wasteful number, since it uses less digits than its factorization.

31021100041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179312890.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31021100041 its reverse (14000112013), we get a palindrome (45021212054).

The spelling of 31021100041 in words is "thirty-one billion, twenty-one million, one hundred thousand, forty-one".