31421111044243 has 2 divisors, whose sum is σ = 31421111044244. Its totient is φ = 31421111044242.

The previous prime is 31421111044159. The next prime is 31421111044313. The reversal of 31421111044243 is 34244011112413.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31421111044243 is a prime.

It is not a weakly prime, because it can be changed into another prime (31421111024243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710555522121 + 15710555522122.

It is an arithmetic number, because the mean of its divisors is an integer number (15710555522122).

Almost surely, 2^{31421111044243} is an apocalyptic number.

31421111044243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31421111044243 is an equidigital number, since it uses as much as digits as its factorization.

31421111044243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 31421111044243 its reverse (34244011112413), we get a palindrome (65665122156656).

The spelling of 31421111044243 in words is "thirty-one trillion, four hundred twenty-one billion, one hundred eleven million, forty-four thousand, two hundred forty-three".