31221331221041 has 4 divisors (see below), whose sum is σ = 33622972084212. Its totient is φ = 28819690357872.

The previous prime is 31221331221011. The next prime is 31221331221053. The reversal of 31221331221041 is 14012213312213.

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 2686717652641 + 28534613568400 = 1639121^2 + 5341780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31221331221041 is a prime.

It is a super-2 number, since 2×31221331221041² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31221331221041.

It is not an unprimeable number, because it can be changed into a prime (31221331221011) 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, 1200820431566 + ... + 1200820431591.

It is an arithmetic number, because the mean of its divisors is an integer number (8405743021053).

Almost surely, 2^{31221331221041} is an apocalyptic number.

It is an amenable number.

31221331221041 is a deficient number, since it is larger than the sum of its proper divisors (2401640863171).

31221331221041 is a wasteful number, since it uses less digits than its factorization.

31221331221041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401640863170.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31221331221041 its reverse (14012213312213), we get a palindrome (45233544533254).

The spelling of 31221331221041 in words is "thirty-one trillion, two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, forty-one".