31111011021133 has 2 divisors, whose sum is σ = 31111011021134. Its totient is φ = 31111011021132.

The previous prime is 31111011021131. The next prime is 31111011021143. The reversal of 31111011021133 is 33112011011113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29224857624004 + 1886153397129 = 5406002^2 + 1373373^2 .

It is a cyclic number.

It is not a de Polignac number, because 31111011021133 - 2¹ = 31111011021131 is a prime.

Together with 31111011021131, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31111011021133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111011021131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555505510566 + 15555505510567.

It is an arithmetic number, because the mean of its divisors is an integer number (15555505510567).

Almost surely, 2^{31111011021133} is an apocalyptic number.

It is an amenable number.

31111011021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111011021133 is an equidigital number, since it uses as much as digits as its factorization.

31111011021133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 31111011021133 its reverse (33112011011113), we get a palindrome (64223022032246).

The spelling of 31111011021133 in words is "thirty-one trillion, one hundred eleven billion, eleven million, twenty-one thousand, one hundred thirty-three".