400111123 has 8 divisors (see below), whose sum is σ = 402526800. Its totient is φ = 397703040.

The previous prime is 400111121. The next prime is 400111147. The reversal of 400111123 is 321111004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400111123 - 2¹ = 400111121 is a prime.

It is a super-2 number, since 2×400111123² = 320177821496642258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400111121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129703 + ... + 132751.

It is an arithmetic number, because the mean of its divisors is an integer number (50315850).

Almost surely, 2^400111123 is an apocalyptic number.

400111123 is a deficient number, since it is larger than the sum of its proper divisors (2415677).

400111123 is a wasteful number, since it uses less digits than its factorization.

400111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 400111123 is about 20002.7778820843. Note that the first 3 decimals coincide. The cubic root of 400111123 is about 736.8745235161.

Adding to 400111123 its reverse (321111004), we get a palindrome (721222127).

The spelling of 400111123 in words is "four hundred million, one hundred eleven thousand, one hundred twenty-three".