40224121 has 16 divisors (see below), whose sum is σ = 48706560. Its totient is φ = 32449680.

The previous prime is 40224103. The next prime is 40224133. The reversal of 40224121 is 12142204.

It is a cyclic number.

It is not a de Polignac number, because 40224121 - 2⁵ = 40224089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40224095 and 40224104.

It is not an unprimeable number, because it can be changed into a prime (40224101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21306 + ... + 23116.

It is an arithmetic number, because the mean of its divisors is an integer number (3044160).

Almost surely, 2^40224121 is an apocalyptic number.

It is an amenable number.

40224121 is a deficient number, since it is larger than the sum of its proper divisors (8482439).

40224121 is a wasteful number, since it uses less digits than its factorization.

40224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004.

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

The square root of 40224121 is about 6342.2488913634. The cubic root of 40224121 is about 342.6327359492.

Adding to 40224121 its reverse (12142204), we get a palindrome (52366325).

The spelling of 40224121 in words is "forty million, two hundred twenty-four thousand, one hundred twenty-one".