21111110093 has 2 divisors, whose sum is σ = 21111110094. Its totient is φ = 21111110092.

The previous prime is 21111110087. The next prime is 21111110123. The reversal of 21111110093 is 39001111112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14242512964 + 6868597129 = 119342^2 + 82877^2 .

It is a cyclic number.

It is not a de Polignac number, because 21111110093 - 2¹⁶ = 21111044557 is a prime.

It is a super-3 number, since 3×21111110093³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21111110023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555555046 + 10555555047.

It is an arithmetic number, because the mean of its divisors is an integer number (10555555047).

Almost surely, 2^21111110093 is an apocalyptic number.

It is an amenable number.

21111110093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111110093 is an equidigital number, since it uses as much as digits as its factorization.

21111110093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 21111110093 in words is "twenty-one billion, one hundred eleven million, one hundred ten thousand, ninety-three".