400135423101 has 4 divisors (see below), whose sum is σ = 533513897472. Its totient is φ = 266756948732.

The previous prime is 400135423091. The next prime is 400135423117. The reversal of 400135423101 is 101324531004.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 400135423101 - 2¹⁰ = 400135422077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400135423141) 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, 66689237181 + ... + 66689237186.

It is an arithmetic number, because the mean of its divisors is an integer number (133378474368).

Almost surely, 2^400135423101 is an apocalyptic number.

It is an amenable number.

400135423101 is a deficient number, since it is larger than the sum of its proper divisors (133378474371).

400135423101 is a wasteful number, since it uses less digits than its factorization.

400135423101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133378474370.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 400135423101 its reverse (101324531004), we get a palindrome (501459954105).

The spelling of 400135423101 in words is "four hundred billion, one hundred thirty-five million, four hundred twenty-three thousand, one hundred one".