40011212 has 6 divisors (see below), whose sum is σ = 70019628.
Its totient is φ = 20005604.
The previous prime is 40011211. The next prime is 40011233. The reversal of 40011212 is 21211004.
It is a junction number, because it is equal to n+sod(n) for n = 40011193 and 40011202.
It is not an unprimeable number, because it can be changed into a prime (40011211) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001398 + ... + 5001405.
It is an arithmetic number, because the mean of its divisors is an integer number (11669938).
Almost surely, 240011212 is an apocalyptic number.
It is an amenable number.
40011212 is a deficient number, since it is larger than the sum of its proper divisors (30008416).
40011212 is a wasteful number, since it uses less digits than its factorization.
40011212 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10002807 (or 10002805 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 40011212 is about 6325.4416446601.
The cubic root of 40011212 is about 342.0271401008.
Adding to 40011212 its reverse (21211004), we get a palindrome (61222216).
The spelling of 40011212 in words is "forty million, eleven thousand, two hundred twelve".