31103221030313 has 2 divisors, whose sum is σ = 31103221030314. Its totient is φ = 31103221030312.

The previous prime is 31103221030279. The next prime is 31103221030337. The reversal of 31103221030313 is 31303012230113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17239535810704 + 13863685219609 = 4152052^2 + 3723397^2 .

It is a cyclic number.

It is not a de Polignac number, because 31103221030313 - 2³² = 31098926063017 is a prime.

It is not a weakly prime, because it can be changed into another prime (31103221030913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551610515156 + 15551610515157.

It is an arithmetic number, because the mean of its divisors is an integer number (15551610515157).

Almost surely, 2^{31103221030313} is an apocalyptic number.

It is an amenable number.

31103221030313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103221030313 is an equidigital number, since it uses as much as digits as its factorization.

31103221030313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31103221030313 its reverse (31303012230113), we get a palindrome (62406233260426).

The spelling of 31103221030313 in words is "thirty-one trillion, one hundred three billion, two hundred twenty-one million, thirty thousand, three hundred thirteen".