406121222 has 16 divisors (see below), whose sum is σ = 661055472. Its totient is φ = 186008160.

The previous prime is 406121167. The next prime is 406121227. The reversal of 406121222 is 222121604.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 406121194 and 406121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406121227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56213 + ... + 63024.

It is an arithmetic number, because the mean of its divisors is an integer number (41315967).

Almost surely, 2^406121222 is an apocalyptic number.

406121222 is a deficient number, since it is larger than the sum of its proper divisors (254934250).

406121222 is a wasteful number, since it uses less digits than its factorization.

406121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119383.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 406121222 is about 20152.4495285313. The cubic root of 406121222 is about 740.5457515353.

Adding to 406121222 its reverse (222121604), we get a palindrome (628242826).

The spelling of 406121222 in words is "four hundred six million, one hundred twenty-one thousand, two hundred twenty-two".