9913211111 has 2 divisors, whose sum is σ = 9913211112. Its totient is φ = 9913211110.

The previous prime is 9913211101. The next prime is 9913211153. The reversal of 9913211111 is 1111123199.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111123199) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9913211111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9913211101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956605555 + 4956605556.

It is an arithmetic number, because the mean of its divisors is an integer number (4956605556).

Almost surely, 2^9913211111 is an apocalyptic number.

9913211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913211111 is an equidigital number, since it uses as much as digits as its factorization.

9913211111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 29.

The square root of 9913211111 is about 99565.1099080396. The cubic root of 9913211111 is about 2148.1838718454.

The spelling of 9913211111 in words is "nine billion, nine hundred thirteen million, two hundred eleven thousand, one hundred eleven".