11235812381 has 2 divisors, whose sum is σ = 11235812382. Its totient is φ = 11235812380.

The previous prime is 11235812353. The next prime is 11235812383. The reversal of 11235812381 is 18321853211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11234940025 + 872356 = 105995^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 11235812381 - 2¹⁸ = 11235550237 is a prime.

It is a super-2 number, since 2×11235812381² (a number of 21 digits) contains 22 as substring.

Together with 11235812383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11235812383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5617906190 + 5617906191.

It is an arithmetic number, because the mean of its divisors is an integer number (5617906191).

Almost surely, 2^11235812381 is an apocalyptic number.

It is an amenable number.

11235812381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11235812381 is an equidigital number, since it uses as much as digits as its factorization.

11235812381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 35.

The spelling of 11235812381 in words is "eleven billion, two hundred thirty-five million, eight hundred twelve thousand, three hundred eighty-one".