31103141021 has 8 divisors (see below), whose sum is σ = 32014927800. Its totient is φ = 30195099648.

The previous prime is 31103140973. The next prime is 31103141033. The reversal of 31103141021 is 12014130113.

It can be written as a sum of positive squares in 4 ways, for example, as 4399005625 + 26704135396 = 66325^2 + 163414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31103141021 - 2¹⁰ = 31103139997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103143021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919496 + ... + 952721.

It is an arithmetic number, because the mean of its divisors is an integer number (4001865975).

Almost surely, 2^31103141021 is an apocalyptic number.

It is an amenable number.

31103141021 is a deficient number, since it is larger than the sum of its proper divisors (911786779).

31103141021 is a wasteful number, since it uses less digits than its factorization.

31103141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872703.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31103141021 its reverse (12014130113), we get a palindrome (43117271134).

The spelling of 31103141021 in words is "thirty-one billion, one hundred three million, one hundred forty-one thousand, twenty-one".