1100100401 has 4 divisors (see below), whose sum is σ = 1100170992. Its totient is φ = 1100029812.

The previous prime is 1100100389. The next prime is 1100100427. The reversal of 1100100401 is 1040010011.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1040010011 = 19 ⋅54737369.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100100401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1100120401) 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, 455 + ... + 46908.

It is an arithmetic number, because the mean of its divisors is an integer number (275042748).

Almost surely, 2^1100100401 is an apocalyptic number.

It is an amenable number.

1100100401 is a deficient number, since it is larger than the sum of its proper divisors (70591).

1100100401 is an equidigital number, since it uses as much as digits as its factorization.

1100100401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70590.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1100100401 is about 33167.7614710429. The cubic root of 1100100401 is about 1032.3115211542.

Adding to 1100100401 its reverse (1040010011), we get a palindrome (2140110412).

The spelling of 1100100401 in words is "one billion, one hundred million, one hundred thousand, four hundred one".