400221123 has 8 divisors (see below), whose sum is σ = 565018128. Its totient is φ = 251119104.

The previous prime is 400221109. The next prime is 400221139. The reversal of 400221123 is 321122004.

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

It is not a de Polignac number, because 400221123 - 2²⁰ = 399172547 is a prime.

It is a super-2 number, since 2×400221123² = 320353894590762258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400221223) 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, 3923686 + ... + 3923787.

It is an arithmetic number, because the mean of its divisors is an integer number (70627266).

Almost surely, 2^400221123 is an apocalyptic number.

400221123 is a deficient number, since it is larger than the sum of its proper divisors (164797005).

400221123 is a wasteful number, since it uses less digits than its factorization.

400221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7847493.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400221123 is about 20005.5273112208. The cubic root of 400221123 is about 736.9420454003.

Adding to 400221123 its reverse (321122004), we get a palindrome (721343127).

The spelling of 400221123 in words is "four hundred million, two hundred twenty-one thousand, one hundred twenty-three".