400121223 has 4 divisors (see below), whose sum is σ = 533494968. Its totient is φ = 266747480.

The previous prime is 400121191. The next prime is 400121243. The reversal of 400121223 is 322121004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400121223 - 2⁵ = 400121191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400121243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66686868 + ... + 66686873.

It is an arithmetic number, because the mean of its divisors is an integer number (133373742).

Almost surely, 2^400121223 is an apocalyptic number.

400121223 is a deficient number, since it is larger than the sum of its proper divisors (133373745).

400121223 is a wasteful number, since it uses less digits than its factorization.

400121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133373744.

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

The square root of 400121223 is about 20003.0303454252. The cubic root of 400121223 is about 736.8807237687.

Adding to 400121223 its reverse (322121004), we get a palindrome (722242227).

The spelling of 400121223 in words is "four hundred million, one hundred twenty-one thousand, two hundred twenty-three".