400221124 has 24 divisors (see below), whose sum is σ = 718507328. Its totient is φ = 194957280.

The previous prime is 400221109. The next prime is 400221139. The reversal of 400221124 is 421122004.

It is an interprime number because it is at equal distance from previous prime (400221109) and next prime (400221139).

It is a junction number, because it is equal to n+sod(n) for n = 400221098 and 400221107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69649 + ... + 75175.

Almost surely, 2^400221124 is an apocalyptic number.

It is an amenable number.

400221124 is a deficient number, since it is larger than the sum of its proper divisors (318286204).

400221124 is a wasteful number, since it uses less digits than its factorization.

400221124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5995 (or 5993 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400221124 is about 20005.5273362139. The cubic root of 400221124 is about 736.9420460140.

Adding to 400221124 its reverse (421122004), we get a palindrome (821343128).

The spelling of 400221124 in words is "four hundred million, two hundred twenty-one thousand, one hundred twenty-four".