1103401021 has 4 divisors (see below), whose sum is σ = 1103474332. Its totient is φ = 1103327712.

The previous prime is 1103401009. The next prime is 1103401037. The reversal of 1103401021 is 1201043011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1201043011 = 7 ⋅171577573.

It can be written as a sum of positive squares in 2 ways, for example, as 580135396 + 523265625 = 24086^2 + 22875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103401021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103400992 and 1103401010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103401051) 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, 4920 + ... + 47233.

It is an arithmetic number, because the mean of its divisors is an integer number (275868583).

Almost surely, 2^1103401021 is an apocalyptic number.

It is an amenable number.

1103401021 is a deficient number, since it is larger than the sum of its proper divisors (73311).

1103401021 is an equidigital number, since it uses as much as digits as its factorization.

1103401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73310.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1103401021 is about 33217.4806540171. The cubic root of 1103401021 is about 1033.3429015995.

Adding to 1103401021 its reverse (1201043011), we get a palindrome (2304444032).

The spelling of 1103401021 in words is "one billion, one hundred three million, four hundred one thousand, twenty-one".