400011212 has 24 divisors (see below), whose sum is σ = 714823200. Its totient is φ = 195820416.

The previous prime is 400011203. The next prime is 400011217. The reversal of 400011212 is 212110004.

It is a junction number, because it is equal to n+sod(n) for n = 400011193 and 400011202.

It is not an unprimeable number, because it can be changed into a prime (400011217) 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, 31214 + ... + 42122.

It is an arithmetic number, because the mean of its divisors is an integer number (29784300).

Almost surely, 2^400011212 is an apocalyptic number.

It is an amenable number.

400011212 is a deficient number, since it is larger than the sum of its proper divisors (314811988).

400011212 is a wasteful number, since it uses less digits than its factorization.

400011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11105 (or 11103 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 400011212 is about 20000.2802980358. The cubic root of 400011212 is about 736.8131838906.

Adding to 400011212 its reverse (212110004), we get a palindrome (612121216).

The spelling of 400011212 in words is "four hundred million, eleven thousand, two hundred twelve".