31421221330244 has 12 divisors (see below), whose sum is σ = 55043075419584. Its totient is φ = 15694628353224.

The previous prime is 31421221330243. The next prime is 31421221330267. The reversal of 31421221330244 is 44203312212413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31421221330244.

It is not an unprimeable number, because it can be changed into a prime (31421221330243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3995573552 + ... + 3995581415.

It is an arithmetic number, because the mean of its divisors is an integer number (4586922951632).

Almost surely, 2^{31421221330244} is an apocalyptic number.

It is an amenable number.

31421221330244 is a deficient number, since it is larger than the sum of its proper divisors (23621854089340).

31421221330244 is a wasteful number, since it uses less digits than its factorization.

31421221330244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991155954 (or 7991155952 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31421221330244 its reverse (44203312212413), we get a palindrome (75624533542657).

The spelling of 31421221330244 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred twenty-one million, three hundred thirty thousand, two hundred forty-four".