31333113113213 has 2 divisors, whose sum is σ = 31333113113214. Its totient is φ = 31333113113212.

The previous prime is 31333113113201. The next prime is 31333113113231. The reversal of 31333113113213 is 31231131133313.

Together with next prime (31333113113231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17440295640964 + 13892817472249 = 4176158^2 + 3727307^2 .

It is an emirp because it is prime and its reverse (31231131133313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31333113113213 - 2³² = 31328818145917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31333113113713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15666556556606 + 15666556556607.

It is an arithmetic number, because the mean of its divisors is an integer number (15666556556607).

Almost surely, 2^{31333113113213} is an apocalyptic number.

It is an amenable number.

31333113113213 is a deficient number, since it is larger than the sum of its proper divisors (1).

31333113113213 is an equidigital number, since it uses as much as digits as its factorization.

31333113113213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 29.

Adding to 31333113113213 its reverse (31231131133313), we get a palindrome (62564244246526).

The spelling of 31333113113213 in words is "thirty-one trillion, three hundred thirty-three billion, one hundred thirteen million, one hundred thirteen thousand, two hundred thirteen".