31211130222227 has 2 divisors, whose sum is σ = 31211130222228. Its totient is φ = 31211130222226.

The previous prime is 31211130222197. The next prime is 31211130222229. The reversal of 31211130222227 is 72222203111213.

It is a strong prime.

It is an emirp because it is prime and its reverse (72222203111213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31211130222227 is a prime.

Together with 31211130222229, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31211130222227.

It is not a weakly prime, because it can be changed into another prime (31211130222229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605565111113 + 15605565111114.

It is an arithmetic number, because the mean of its divisors is an integer number (15605565111114).

Almost surely, 2^{31211130222227} is an apocalyptic number.

31211130222227 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211130222227 is an equidigital number, since it uses as much as digits as its factorization.

31211130222227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 31211130222227 in words is "thirty-one trillion, two hundred eleven billion, one hundred thirty million, two hundred twenty-two thousand, two hundred twenty-seven".