31103010010381 has 2 divisors, whose sum is σ = 31103010010382. Its totient is φ = 31103010010380.

The previous prime is 31103010010337. The next prime is 31103010010399. The reversal of 31103010010381 is 18301001030113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18324315437481 + 12778694572900 = 4280691^2 + 3574730^2 .

It is an emirp because it is prime and its reverse (18301001030113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31103010010381 - 2¹⁹ = 31103009486093 is a prime.

It is a super-2 number, since 2×31103010010381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103010010181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551505005190 + 15551505005191.

It is an arithmetic number, because the mean of its divisors is an integer number (15551505005191).

Almost surely, 2^{31103010010381} is an apocalyptic number.

It is an amenable number.

31103010010381 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103010010381 is an equidigital number, since it uses as much as digits as its factorization.

31103010010381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31103010010381 its reverse (18301001030113), we get a palindrome (49404011040494).

The spelling of 31103010010381 in words is "thirty-one trillion, one hundred three billion, ten million, ten thousand, three hundred eighty-one".