1111022491 has 2 divisors, whose sum is σ = 1111022492. Its totient is φ = 1111022490.

The previous prime is 1111022489. The next prime is 1111022501. The reversal of 1111022491 is 1942201111.

It is a weak prime.

It is an emirp because it is prime and its reverse (1942201111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111022491 - 2¹ = 1111022489 is a prime.

Together with 1111022489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1111022191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555511245 + 555511246.

It is an arithmetic number, because the mean of its divisors is an integer number (555511246).

Almost surely, 2^1111022491 is an apocalyptic number.

1111022491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111022491 is an equidigital number, since it uses as much as digits as its factorization.

1111022491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1111022491 is about 33332.0040051600. The cubic root of 1111022491 is about 1035.7166315902.

The spelling of 1111022491 in words is "one billion, one hundred eleven million, twenty-two thousand, four hundred ninety-one".