31421221003205 has 8 divisors (see below), whose sum is σ = 41133234767904. Its totient is φ = 22851797093200.

The previous prime is 31421221003189. The next prime is 31421221003217. The reversal of 31421221003205 is 50230012212413.

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

It is not a de Polignac number, because 31421221003205 - 2⁴ = 31421221003189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285647463611 + ... + 285647463720.

It is an arithmetic number, because the mean of its divisors is an integer number (5141654345988).

Almost surely, 2^{31421221003205} is an apocalyptic number.

It is an amenable number.

31421221003205 is a deficient number, since it is larger than the sum of its proper divisors (9712013764699).

31421221003205 is a wasteful number, since it uses less digits than its factorization.

31421221003205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571294927347.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31421221003205 its reverse (50230012212413), we get a palindrome (81651233215618).

The spelling of 31421221003205 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred twenty-one million, three thousand, two hundred five".