31421111044321 has 16 divisors (see below), whose sum is σ = 31536864691200. Its totient is φ = 31305587776848.

The previous prime is 31421111044313. The next prime is 31421111044327. The reversal of 31421111044321 is 12344011112413.

It is a cyclic number.

It is not a de Polignac number, because 31421111044321 - 2³ = 31421111044313 is a prime.

It is a super-2 number, since 2×31421111044321² (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 31421111044321.

It is not an unprimeable number, because it can be changed into a prime (31421111044327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028869470 + ... + 1028900008.

It is an arithmetic number, because the mean of its divisors is an integer number (1971054043200).

Almost surely, 2^{31421111044321} is an apocalyptic number.

It is an amenable number.

31421111044321 is a deficient number, since it is larger than the sum of its proper divisors (115753646879).

31421111044321 is a wasteful number, since it uses less digits than its factorization.

31421111044321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34188.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 31421111044321 its reverse (12344011112413), we get a palindrome (43765122156734).

The spelling of 31421111044321 in words is "thirty-one trillion, four hundred twenty-one billion, one hundred eleven million, forty-four thousand, three hundred twenty-one".