11331121132381 has 2 divisors, whose sum is σ = 11331121132382. Its totient is φ = 11331121132380.

The previous prime is 11331121132343. The next prime is 11331121132393. The reversal of 11331121132381 is 18323112113311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11296764656356 + 34356476025 = 3361066^2 + 185355^2 .

It is an emirp because it is prime and its reverse (18323112113311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11331121132381 - 2¹⁷ = 11331121001309 is a prime.

It is a super-2 number, since 2×11331121132381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331121132481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665560566190 + 5665560566191.

It is an arithmetic number, because the mean of its divisors is an integer number (5665560566191).

Almost surely, 2^{11331121132381} is an apocalyptic number.

It is an amenable number.

11331121132381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331121132381 is an equidigital number, since it uses as much as digits as its factorization.

11331121132381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

Adding to 11331121132381 its reverse (18323112113311), we get a palindrome (29654233245692).

The spelling of 11331121132381 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-one million, one hundred thirty-two thousand, three hundred eighty-one".