1011105421 has 4 divisors (see below), whose sum is σ = 1014399232. Its totient is φ = 1007811612.

The previous prime is 1011105377. The next prime is 1011105427. The reversal of 1011105421 is 1245011101.

1011105421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1245011101 = 647 ⋅1924283.

It is a cyclic number.

It is not a de Polignac number, because 1011105421 - 2¹⁵ = 1011072653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011105395 and 1011105404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011105427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1646445 + ... + 1647058.

It is an arithmetic number, because the mean of its divisors is an integer number (253599808).

Almost surely, 2^1011105421 is an apocalyptic number.

It is an amenable number.

1011105421 is a deficient number, since it is larger than the sum of its proper divisors (3293811).

1011105421 is an equidigital number, since it uses as much as digits as its factorization.

1011105421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293810.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1011105421 is about 31797.8839075810. The cubic root of 1011105421 is about 1003.6881875495.

Adding to 1011105421 its reverse (1245011101), we get a palindrome (2256116522).

The spelling of 1011105421 in words is "one billion, eleven million, one hundred five thousand, four hundred twenty-one".