400001123401 has 32 divisors (see below), whose sum is σ = 469766537856. Its totient is φ = 337151808000.

The previous prime is 400001123383. The next prime is 400001123437. The reversal of 400001123401 is 104321100004.

It is a cyclic number.

It is not a de Polignac number, because 400001123401 - 2¹¹ = 400001121353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400001123101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438811 + ... + 996271.

It is an arithmetic number, because the mean of its divisors is an integer number (14680204308).

Almost surely, 2^400001123401 is an apocalyptic number.

400001123401 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

400001123401 is a deficient number, since it is larger than the sum of its proper divisors (69765414455).

400001123401 is a wasteful number, since it uses less digits than its factorization.

400001123401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557593.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 400001123401 its reverse (104321100004), we get a palindrome (504322223405).

The spelling of 400001123401 in words is "four hundred billion, one million, one hundred twenty-three thousand, four hundred one".