101120405 has 4 divisors (see below), whose sum is σ = 121344492. Its totient is φ = 80896320.

The previous prime is 101120389. The next prime is 101120407. The reversal of 101120405 is 504021101.

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 50112241 + 51008164 = 7079^2 + 7142^2 .

It is not a de Polignac number, because 101120405 - 2⁴ = 101120389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101120405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101120407) 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, 10112036 + ... + 10112045.

It is an arithmetic number, because the mean of its divisors is an integer number (30336123).

Almost surely, 2^101120405 is an apocalyptic number.

It is an amenable number.

101120405 is a deficient number, since it is larger than the sum of its proper divisors (20224087).

101120405 is an equidigital number, since it uses as much as digits as its factorization.

101120405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20224086.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 101120405 is about 10055.8642095048. The cubic root of 101120405 is about 465.8859357829.

Adding to 101120405 its reverse (504021101), we get a palindrome (605141506).

The spelling of 101120405 in words is "one hundred one million, one hundred twenty thousand, four hundred five".