981122111 has 2 divisors, whose sum is σ = 981122112. Its totient is φ = 981122110.

The previous prime is 981122083. The next prime is 981122119. The reversal of 981122111 is 111221189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981122111 - 2¹⁰ = 981121087 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981122119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490561055 + 490561056.

It is an arithmetic number, because the mean of its divisors is an integer number (490561056).

Almost surely, 2^981122111 is an apocalyptic number.

981122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

981122111 is an equidigital number, since it uses as much as digits as its factorization.

981122111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 26.

The square root of 981122111 is about 31322.8688181654. The cubic root of 981122111 is about 993.6673525613.

The spelling of 981122111 in words is "nine hundred eighty-one million, one hundred twenty-two thousand, one hundred eleven".