221110011101893 has 2 divisors, whose sum is σ = 221110011101894. Its totient is φ = 221110011101892.

The previous prime is 221110011101891. The next prime is 221110011102031. The reversal of 221110011101893 is 398101110011122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118130096100289 + 102979915001604 = 10868767^2 + 10147902^2 .

It is a cyclic number.

It is not a de Polignac number, because 221110011101893 - 2¹ = 221110011101891 is a prime.

Together with 221110011101891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221110011101891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555005550946 + 110555005550947.

It is an arithmetic number, because the mean of its divisors is an integer number (110555005550947).

Almost surely, 2^{221110011101893} is an apocalyptic number.

It is an amenable number.

221110011101893 is a deficient number, since it is larger than the sum of its proper divisors (1).

221110011101893 is an equidigital number, since it uses as much as digits as its factorization.

221110011101893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 31.

The spelling of 221110011101893 in words is "two hundred twenty-one trillion, one hundred ten billion, eleven million, one hundred one thousand, eight hundred ninety-three".