2011233533381 has 2 divisors, whose sum is σ = 2011233533382. Its totient is φ = 2011233533380.

The previous prime is 2011233533303. The next prime is 2011233533383. The reversal of 2011233533381 is 1833353321102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2000117205025 + 11116328356 = 1414255^2 + 105434^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011233533381 - 2²⁶ = 2011166424517 is a prime.

It is a super-2 number, since 2×2011233533381² (a number of 25 digits) contains 22 as substring.

Together with 2011233533383, 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 (2011233533383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005616766690 + 1005616766691.

It is an arithmetic number, because the mean of its divisors is an integer number (1005616766691).

Almost surely, 2^{2011233533381} is an apocalyptic number.

It is an amenable number.

2011233533381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011233533381 is an equidigital number, since it uses as much as digits as its factorization.

2011233533381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 2011233533381 its reverse (1833353321102), we get a palindrome (3844586854483).

The spelling of 2011233533381 in words is "two trillion, eleven billion, two hundred thirty-three million, five hundred thirty-three thousand, three hundred eighty-one".