11211111893 has 2 divisors, whose sum is σ = 11211111894. Its totient is φ = 11211111892.

The previous prime is 11211111869. The next prime is 11211111931. The reversal of 11211111893 is 39811111211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11166782929 + 44328964 = 105673^2 + 6658^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211111893 - 2²⁴ = 11194334677 is a prime.

It is a super-3 number, since 3×11211111893³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211111803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605555946 + 5605555947.

It is an arithmetic number, because the mean of its divisors is an integer number (5605555947).

Almost surely, 2^11211111893 is an apocalyptic number.

It is an amenable number.

11211111893 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211111893 is an equidigital number, since it uses as much as digits as its factorization.

11211111893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 29.

It can be divided in two parts, 112111118 and 93, that added together give a palindrome (112111211).

The spelling of 11211111893 in words is "eleven billion, two hundred eleven million, one hundred eleven thousand, eight hundred ninety-three".