31103313213223 has 2 divisors, whose sum is σ = 31103313213224. Its totient is φ = 31103313213222.

The previous prime is 31103313213197. The next prime is 31103313213253. The reversal of 31103313213223 is 32231231330113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31103313213223 - 2¹⁷ = 31103313082151 is a prime.

It is a super-2 number, since 2×31103313213223² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31103313213191 and 31103313213200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103313213253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551656606611 + 15551656606612.

It is an arithmetic number, because the mean of its divisors is an integer number (15551656606612).

Almost surely, 2^{31103313213223} is an apocalyptic number.

31103313213223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103313213223 is an equidigital number, since it uses as much as digits as its factorization.

31103313213223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31103313213223 its reverse (32231231330113), we get a palindrome (63334544543336).

The spelling of 31103313213223 in words is "thirty-one trillion, one hundred three billion, three hundred thirteen million, two hundred thirteen thousand, two hundred twenty-three".