1105200421 has 4 divisors (see below), whose sum is σ = 1190215852. Its totient is φ = 1020184992.

The previous prime is 1105200419. The next prime is 1105200431. The reversal of 1105200421 is 1240025011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198528100 + 906672321 = 14090^2 + 30111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105200421 - 2¹ = 1105200419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1105200395 and 1105200404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105200431) 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, 42507696 + ... + 42507721.

It is an arithmetic number, because the mean of its divisors is an integer number (297553963).

Almost surely, 2^1105200421 is an apocalyptic number.

It is an amenable number.

1105200421 is a deficient number, since it is larger than the sum of its proper divisors (85015431).

1105200421 is an equidigital number, since it uses as much as digits as its factorization.

1105200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85015430.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1105200421 is about 33244.5547571328. The cubic root of 1105200421 is about 1033.9043134956.

Adding to 1105200421 its reverse (1240025011), we get a palindrome (2345225432).

The spelling of 1105200421 in words is "one billion, one hundred five million, two hundred thousand, four hundred twenty-one".