31431141321011 has 2 divisors, whose sum is σ = 31431141321012. Its totient is φ = 31431141321010.

The previous prime is 31431141320981. The next prime is 31431141321037. The reversal of 31431141321011 is 11012314113413.

It is a happy number.

It is an a-pointer prime, because the next prime (31431141321037) can be obtained adding 31431141321011 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31431141321011 - 2²² = 31431137126707 is a prime.

It is a super-2 number, since 2×31431141321011² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31431141321311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715570660505 + 15715570660506.

It is an arithmetic number, because the mean of its divisors is an integer number (15715570660506).

Almost surely, 2^{31431141321011} is an apocalyptic number.

31431141321011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31431141321011 is an equidigital number, since it uses as much as digits as its factorization.

31431141321011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 31431141321011 its reverse (11012314113413), we get a palindrome (42443455434424).

The spelling of 31431141321011 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred forty-one million, three hundred twenty-one thousand, eleven".