21113050111 has 2 divisors, whose sum is σ = 21113050112. Its totient is φ = 21113050110.

The previous prime is 21113050093. The next prime is 21113050129. The reversal of 21113050111 is 11105031112.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21113050093) and next prime (21113050129).

It is a cyclic number.

It is not a de Polignac number, because 21113050111 - 2²¹ = 21110952959 is a prime.

It is a super-2 number, since 2×21113050111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113050141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556525055 + 10556525056.

It is an arithmetic number, because the mean of its divisors is an integer number (10556525056).

Almost surely, 2^21113050111 is an apocalyptic number.

21113050111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113050111 is an equidigital number, since it uses as much as digits as its factorization.

21113050111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 21113050111 its reverse (11105031112), we get a palindrome (32218081223).

The spelling of 21113050111 in words is "twenty-one billion, one hundred thirteen million, fifty thousand, one hundred eleven".