400111122 has 16 divisors (see below), whose sum is σ = 807992640. Its totient is φ = 132075312.

The previous prime is 400111121. The next prime is 400111147. The reversal of 400111122 is 221111004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400111098 and 400111107.

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, 323097 + ... + 324332.

It is an arithmetic number, because the mean of its divisors is an integer number (50499540).

Almost surely, 2^400111122 is an apocalyptic number.

400111122 is an abundant number, since it is smaller than the sum of its proper divisors (407881518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400111122 is a wasteful number, since it uses less digits than its factorization.

400111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647537.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 400111122 is about 20002.7778570878. Note that the first 3 decimals coincide. The cubic root of 400111122 is about 736.8745229023.

Adding to 400111122 its reverse (221111004), we get a palindrome (621222126).

The spelling of 400111122 in words is "four hundred million, one hundred eleven thousand, one hundred twenty-two".