21112212211093 has 2 divisors, whose sum is σ = 21112212211094. Its totient is φ = 21112212211092.

The previous prime is 21112212211043. The next prime is 21112212211121. The reversal of 21112212211093 is 39011221221112.

It is an a-pointer prime, because the next prime (21112212211121) can be obtained adding 21112212211093 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15170035686129 + 5942176524964 = 3894873^2 + 2437658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112212211093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112212211043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556106105546 + 10556106105547.

It is an arithmetic number, because the mean of its divisors is an integer number (10556106105547).

Almost surely, 2^{21112212211093} is an apocalyptic number.

It is an amenable number.

21112212211093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112212211093 is an equidigital number, since it uses as much as digits as its factorization.

21112212211093 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 28.

It can be divided in two parts, 2111221221109 and 3, that added together give a palindrome (2111221221112).

The spelling of 21112212211093 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, two hundred eleven thousand, ninety-three".