20111001133 has 2 divisors, whose sum is σ = 20111001134. Its totient is φ = 20111001132.

The previous prime is 20111001121. The next prime is 20111001137. The reversal of 20111001133 is 33110011102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12170943684 + 7940057449 = 110322^2 + 89107^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111001133 - 2²¹ = 20108903981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111001137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055500566 + 10055500567.

It is an arithmetic number, because the mean of its divisors is an integer number (10055500567).

Almost surely, 2^20111001133 is an apocalyptic number.

It is an amenable number.

20111001133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111001133 is an equidigital number, since it uses as much as digits as its factorization.

20111001133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20111001133 its reverse (33110011102), we get a palindrome (53221012235).

The spelling of 20111001133 in words is "twenty billion, one hundred eleven million, one thousand, one hundred thirty-three".