1111022401 has 4 divisors (see below), whose sum is σ = 1111240900. Its totient is φ = 1110803904.

The previous prime is 1111022389. The next prime is 1111022467. The reversal of 1111022401 is 1042201111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1042201111 = 7 ⋅148885873.

It can be written as a sum of positive squares in 2 ways, for example, as 500685376 + 610337025 = 22376^2 + 24705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111022401 - 2⁹ = 1111021889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111022491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101436 + ... + 111853.

It is an arithmetic number, because the mean of its divisors is an integer number (277810225).

Almost surely, 2^1111022401 is an apocalyptic number.

It is an amenable number.

1111022401 is a deficient number, since it is larger than the sum of its proper divisors (218499).

1111022401 is an equidigital number, since it uses as much as digits as its factorization.

1111022401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218498.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1111022401 is about 33332.0026551061. The cubic root of 1111022401 is about 1035.7166036236.

Adding to 1111022401 its reverse (1042201111), we get a palindrome (2153223512).

The spelling of 1111022401 in words is "one billion, one hundred eleven million, twenty-two thousand, four hundred one".