1100100421 has 6 divisors (see below), whose sum is σ = 1279708710. Its totient is φ = 942943176.

The previous prime is 1100100389. The next prime is 1100100427. The reversal of 1100100421 is 1240010011.

It can be written as a sum of positive squares in only one way, i.e., 1083331396 + 16769025 = 32914^2 + 4095^2 .

It is not a de Polignac number, because 1100100421 - 2⁵ = 1100100389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100100398 and 1100100407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100100427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11225466 + ... + 11225563.

It is an arithmetic number, because the mean of its divisors is an integer number (213284785).

Almost surely, 2^1100100421 is an apocalyptic number.

It is an amenable number.

1100100421 is a deficient number, since it is larger than the sum of its proper divisors (179608289).

1100100421 is an equidigital number, since it uses as much as digits as its factorization.

1100100421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22451043 (or 22451036 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1100100421 is about 33167.7617725405. The cubic root of 1100100421 is about 1032.3115274100.

Adding to 1100100421 its reverse (1240010011), we get a palindrome (2340110432).

The spelling of 1100100421 in words is "one billion, one hundred million, one hundred thousand, four hundred twenty-one".