31122230211133 has 2 divisors, whose sum is σ = 31122230211134. Its totient is φ = 31122230211132.

The previous prime is 31122230211053. The next prime is 31122230211157. The reversal of 31122230211133 is 33111203222113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24641117296324 + 6481112914809 = 4963982^2 + 2545803^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122230211133 - 2⁴¹ = 28923206955581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31122230211098 and 31122230211107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122230215133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561115105566 + 15561115105567.

It is an arithmetic number, because the mean of its divisors is an integer number (15561115105567).

Almost surely, 2^{31122230211133} is an apocalyptic number.

It is an amenable number.

31122230211133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122230211133 is an equidigital number, since it uses as much as digits as its factorization.

31122230211133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31122230211133 its reverse (33111203222113), we get a palindrome (64233433433246).

The spelling of 31122230211133 in words is "thirty-one trillion, one hundred twenty-two billion, two hundred thirty million, two hundred eleven thousand, one hundred thirty-three".