31441010221 has 4 divisors (see below), whose sum is σ = 32290767292. Its totient is φ = 30591253152.

The previous prime is 31441010207. The next prime is 31441010257. The reversal of 31441010221 is 12201014413.

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 21885947721 + 9555062500 = 147939^2 + 97750^2 .

It is a cyclic number.

It is not a de Polignac number, because 31441010221 - 2⁹ = 31441009709 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 (31441010921) 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 3 ways as a sum of consecutive naturals, for example, 424878480 + ... + 424878553.

It is an arithmetic number, because the mean of its divisors is an integer number (8072691823).

Almost surely, 2^31441010221 is an apocalyptic number.

It is an amenable number.

31441010221 is a deficient number, since it is larger than the sum of its proper divisors (849757071).

31441010221 is an equidigital number, since it uses as much as digits as its factorization.

31441010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849757070.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31441010221 its reverse (12201014413), we get a palindrome (43642024634).

The spelling of 31441010221 in words is "thirty-one billion, four hundred forty-one million, ten thousand, two hundred twenty-one".