1101100401 has 6 divisors (see below), whose sum is σ = 1590478370. Its totient is φ = 734066928.

The previous prime is 1101100379. The next prime is 1101100411. The reversal of 1101100401 is 1040011011.

It can be written as a sum of positive squares in only one way, i.e., 882090000 + 219010401 = 29700^2 + 14799^2 .

It is not a de Polignac number, because 1101100401 - 2⁶ = 1101100337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 122344489 = 1101100401 / (1 + 1 + 0 + 1 + 1 + 0 + 0 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101100411) 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, 61172236 + ... + 61172253.

Almost surely, 2^1101100401 is an apocalyptic number.

It is an amenable number.

1101100401 is a deficient number, since it is larger than the sum of its proper divisors (489377969).

1101100401 is a wasteful number, since it uses less digits than its factorization.

1101100401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122344495 (or 122344492 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1101100401 is about 33182.8329260779. The cubic root of 1101100401 is about 1032.6242195482.

Adding to 1101100401 its reverse (1040011011), we get a palindrome (2141111412).

The spelling of 1101100401 in words is "one billion, one hundred one million, one hundred thousand, four hundred one".